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The Elephants in the Room – Electricity and Transport Energy

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by Eng. Parakrama Jayasinghe

(Council member Bio Energy Association of Sri Lanka Solar Industries Association of Sri Lanka  Sri Lanka Forum for Sustainable Consumption and Production Forum )

There have been many arguments and discussions on the future of our electricity sector and more importantly the state of finances of the CEB, which continues to bleed the national economy. While this does remain a matter of grave concern, there is a need for a rational approach on all energy challenges.

Although the electricity sector is an elephant in the room there is a much larger mammoth lurking. This is the tremendous drain on foreign exchange due to the complete dependence on imported fossil fuels for our transport. Sri Lanka spent some 7.5 Billion Dollars for the import of oil, back in 2010. But although the import bill in dollar terms came down to 4 Billion Dollars by 2020, the rupee equivalent remains at Rs 760 Billion, due to the continued depreciation of the rupee which appears to be inexorable. The trap mankind and Sri Lanka in particular has fallen into, remains just that, a trap, in which we are wallowing.

 

The reality, which seems to escape the relevant authorities is illustrated here (Illustrations: Mankind’s use of fossil fuel)

 

Whereas, electricity which provides only 11% of our primary energy need, fortunately has some contribution from our own indigenous sources of energy, down to 35% now, from a high of 95% in the 1990s, the transport sector is 100 % dependent on imported oil. The faint silver lining, if I may say so, of the Covid pandemic affecting the whole world, kept the oil prices low and gave some measure of relief to the beleaguered rupee up to now. But looks like the honeymoon is over, with the oil prices on an upward trend already past $ 56. Naturally, if this trend continues past the $ 60 mark per barrel, then the plans and programmes of the Central Bank to hang on to the dwindling foreign reserves and be able to meet the debt payments , will get completely awry.

The highly volatile nature of the world market price of crude oil over which Sri Lanka has absolute no control is shown here (Illustrations: Cost of Oil Imports).

Isn’t it unwise to make plans and forecasts for a most important national need, based on such a variable and uncontrollable input? This viewed, along with the change in parity rate, which with minor fluctuations is on an inexorable upward trend, tells the story.

Fortunately, we are now offered an alternative which was not available even a few years ago.

 

Are we ready to accept this challenge?

The wartime Prime Minister of UK, Winston Churchill once said “Never let any Crisis be wasted”. One may add the more familiar saying”Behind every Crisis lies an Opportunity”. I contributed an article, back in March 2020, when the oil prices were quite low, down below $ 30 per barrel, suggesting not to be complacent and make plans for a paradigm shift in the Transport Policy and make use of this opportunity. But no one took much notice.

The whole world is moving away from the use of petrol and diesel for transport, (even General Motors which killed the first Electric Car in the early 1960s, has plans to go all electric by 2025). So have all the major automobile manufacturers and governments with firm plans to totally electrify transport within this decade itself. Sri Lanka, however, puts up a factory for the manufacture of petrol driven vehicles and considers it a great achievement. There are also moves to spend 2.5 Billion dollars to construct a refinery in Hambantota. These decisions would have been highly appropriate and visionary moves if taken and implemented at the right time, which was at least a decade ago.

But the world has changed drastically during this past decade, particularly in the energy sector, and the transport vehicle technologies. Due to the great efforts of some committed individuals and private sector companies, the electricity sector still remains to some measure protected from this total dependence. But the transport sector has not moved an inch in the right direction, to ensure protection from the vagaries of the world market prices and deteriorating rupee to buy the dollars needed to pay for the oil.

The overdependence on imported sources of energy, in the recent decades, would definitely lead to problems of supplies, even if we have the funds to pay for them. The benefits of any price reductions are now past and the wisdom not to expect such uncertain bonanzas in the future, should dawn on us at least now. In the meanwhile, what is important to the Sri Lankan economy and the consumers is the price per liter in Sri Lanka Rupee terms, which will continue to go up, irrespective of the world market price in US Dollars. The huge import bill on oil itself is largely responsible for the continuing depreciation of the rupee to a very large extent, no

w exceeding over 6% annually.

Although the Yahapalana government effectively scuttled the baby steps being taken for the electrification of the light vehicle fleet, the advent of the Covid has at least led to the wise decision to curtail the import of vehicles, making a virtue of necessity. It is prudent to retain this policy for some years to come. However, it must be noted that the last energy policy published by the previous government in August 2019, includes a target of reaching 25% electrification of the light vehicles by 2023. A good enough starting point.

Why Electrify Transport

No doubt Sri Lanka has a back to the wall battle at this point of time, due to the double whammy of increased price of oil and the depleted rupee, to try and reduce the dependence on imported oil, purely on monetary grounds at present. But there are very valid scientific, environmental and commercial reasons why electrification of the transport is the wise and obvious way for the future.

As already mentioned, all the major automobile manufactures have plans for total departure from the use of Internal Combustion Engines (ICE) using petrol or diesel in their future vehicles. As such, before too long Sri Lanka would have to depend on the laggards who will continue with the ICE engines and face the many problems that would ensue, such as higher costs and lack of spares supply, etc.

But the basic thermodynamic reality of the much higher overall efficiency of the conversion of the input energy in the fuel or electricity to useful energy for driving the vehicle itself is a compelling reason for this change over as illustrated. The reality of gaining from this wonderful boost of efficiency was denied until now till the cost and durability of batteries and the overall cost of the electric vehicles came down to the present values. This change has been rapid and continues on the down ward trend.

The Way Forward.

The starting point, of course, is a firm national policy, made mandatory for compliance. Even the institutions under line Ministries often ignore such policies in their day-to-day programmes. Therefore if at this late stage Sri Lanka is to wake up and see a little beyond the collective nose, the following steps are recommended, if Sri Lanka is to covert this Crisis to an Opportunity.

1.

Declare a policy and time targets to reach 100% electrification of transport sector with intermediate target levels and time frames. Make it a mandatory requirement for all state agencies to abide by and to provide facilitation to achieve same.

2.

Accept the policy statement “4.5 Enhancing Self Reliance Section 5f” in the National Energy Policy Gazette No 2135/61 of 9th August 2019, as a national target and assign responsibilities of achieving this target to the relevant agencies. CEB/LECO to set up Charging Stations and RMV to limit registration of ICE driven light vehicles.

3.

Remove the punitive duty rates imposed on the import of Electric Vehicles which came in to force on the 1st April 2019. These nearly doubled the price of the EVs coming into the country destroying the small growth seen till then.

 

4.

Remove the punitive duties and taxes on the import of deep cycle batteries, imposed on the erroneous notion of protecting local battery industry, which does not manufacture any deep cycle batteries, suitable for EVs or for Solar Energy storage.

5.

Levy a charge on all imports of fossil fuels at point of import and use this fund to offset the loss of income to the treasury by action items 3 and 4 above, and to assist the private sector to install charging stations

The (Illustration: Potential Savings…) chart points to the pot of gold at the end of the rainbow.

These are approximate values based on assumed rates of registrations extrapolating historical data.

Visit www.bioenergysrilanka.lk for details of calculation.

The many ways that this change could benefit the Sri Lankan economy, environment and health is far too many to be included here. But even without such detailed analysis anyone with common sense can readily understand the timeliness and the value of embarking on this change without any further delay.

 

E Mail: parajayasinghe@gmail.com



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Features

The ‘Cheena Abhagya’ on the rise

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There is a big China Hurry in the government that seems much higher than any hurry about controlling the Covid pandemic.

The debate of the Colombo Port City Commission was scheduled for May 5, without even receiving the Supreme Court decision on the many petitions filed before it. This is a complete and shameless shift from the very process of parliamentary debate, the stuff of democracy.

A debate in parliament is based on the material — the facts, plans, decisions, proposals etc – placed before the members. This government with its Vistas of Prosperity and Splendour has no interest in the democratic process. They decide on a date for a debate on what is the most important piece of legislation today, with the MPs not given even an hour to know and study the decision of the Supreme Court on the subject. In fact, it is also a huge insult to the Supreme Court and the judicial process, too.

This decision and its refusal to agree to the Opposition calls for more days for this debate, showed how the government is ready, and determined, to use its two-thirds majority, post 20A, to have no respect for the democratic process.

Although this shameful move by the government failed, due to the Supreme Court decision not reaching the Speaker by that time, the mockery of democracy continues, with the next date for the debate on the Port City subject being fixed for May 18, again with no opportunity for all MPs to read and study the court decision/s on so many matters raised by the petitioners, some of whom were members of parliament too.

This is the China Hurry – Cheena Hadissiya – being displayed, just the initial moves to use the Sinopharm Covid Vaccine on the people of this country, while it has not been approved by the WHO and the responsible Health and Medical officials in this country.

This is the ‘Cheenabhagya’ doing much more than the Saubhagya Dekma of Gotabhaya Power. A rising ‘Abhagya’ or misery to the people.

This Cheenabhagya is certainly impacting others in the government, such as Minister Gamini Lokuge, who decided to arbitrarily lift the lockdown and travel restrictions in Piliyandala. There will be much more Cheena benefits and power in the coming weeks, as the country keeps reeling with the spread of the latest variant of Covid-19. 

The Cabinet move to import gyms to strengthen the muscles of the people is certainly a move to reduce the thinking power of the people. Muscle Power is the stuff of rulers who have no faith in the Brain Power of people, who would dare to question the decisions taken by rulers. The use of this Brain Power is the very substance of the Buddhist thinking that has been the core value of Sri Lanka through the centuries. This is the substance of the Buddha Dharmaya as against the Buddha-agama that has distorted Buddhist teachings. Are the plans to build a Sri Lankan temple, in the premises of the ancient and first Buddhist White Horse Temple in China, a show of the Cheena Dekma – or Chinese Vision – that holds sway among those attached to what will soon be the Cheena Rajavasala in Hambantota. Maybe, we will soon change the name of Hambantota to a Maha Cheenatota, and wipe off the arrival of Hamban people to this country.

Rishad Bathiuddin remains in the spotlight today. His moves with different governments, from the Mahinda Rajapaksa to the Yahapalana have been the cause of much criticism and court orders such as replanting torn down jungles. He is now detained as a terror suspect, and the Cheena Balaya does not want him to attend parliament. Sarath Weerasekera, Minister of Public Security, does not want him in the House, as he will violate the legal process that holds him in custody, as he would most likely reveal the secrets of terrorism inquiries supposedly now underway, and may even help other un-arrested terror suspects to flee the country. This is against the official thinking of the Attorney General, who certainly knows more about law, than a retired armed services officer.

The innocence of an unconvicted person until conviction by a court, is part of our democratic and judicial processes. Weerasekera is wholly pleased to have within the government ranks, in parliament, a person convicted by the courts for the crime of murder in the Ratnapura district, Premalal Jayasekera. Is this power prospect for future murderers, convicted by a court of law? This Cheena Havula also had in its ranks Sivanesathurai Chandrakanthan – Pillayan, while he was held in custody for the murder of a former MP in a Batticaloa church, many years ago. Well, well – he has since been acquitted and released by the Batticaloa High Court

It is not our delight that Rishard Bathiuddin is the focus of a call for democracy within parliament. We are aware of how his party, and the Muslim Congress too, gave support to pass the 20A, and its huge blow to democracy. But the rights of a citizen and an elected MP, have to be protected, whatever the politics and the other stuff of a person may be. To give him the right to attend and speak in parliament is a core value of the democratic process. This cannot be torn away under the Cheena thinking, which is fast taking us to the manipulations of the Chinese Communist Party, in its governance of China.

We are in the throes of a pandemic that is certainly sweeping the country. The need is to guide and handle the fight against it, and save the people of the horror we see just across the Palk Strait. Narendra Modi, who was honoured by his BJP for the so-called success in defeating Covid-19, is now facing humiliating defeats, electorally, socially and globally too. Our fight against this pandemic must be through the values of the democratic process. The values we have seen till 1977, after independence, which have been distorted and destroyed by JRJ and down to the Cheenabhagya of Gotabhaya.

The fight against Covid-19 must be a fight to restore Democracy too, in every form of the people’s rights and freedoms.

Let’s move to Janatha Bhagya, away from the rising Cheena Abhagya of today!

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From Cylinder to Liquid Oxygen Plant

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Story of Oxygen supply at National Hospital –

The National Hospital of Sri Lanka (NHSL) is the largest and best equipped Teaching Hospital in the country with a bed strength of nearly 4,000. It has 26 operating theatres, 28 Intensive Care Units (ICU) and several institutes including one for Cardiology housed in a large number of buildings. It is located on a 32-acre land standing in the middle of Colombo.

NHSL is circled by a ring of busy public roads while some roads are running through the premises. Hospital premises and surrounding roads are always filled with hurriedly pacing medical staff, siren blaring ambulances, patient-carrying trolleys, distressed relatives and tired visitors. One would not miss the sight of a cylinders loaded truck crawling across in this melee and wonder why the truck. They ensure continuous and uninterrupted supply of most essential medical oxygen for the patients treated in ICUs and those undergoing surgery in operating theatres.

A few years ago, a visitor would not have missed the outside walls of these operating theatres and ICUs each of which decorated with 6-7 hanging jumbo oxygen cylinders. When I made the morning strolls down the hospital corridors my eyes always caught the sight of these cylinders. Oxygen is taken through a copper tubing system fixed to these cylinders to the respective destinations. i.e. Oxygen outlet in the bedside of patients treated in ICUs and in operating theatres. Hospital had a sufficient number of cylinders filled with oxygen. Employees efficiently replaced empty cylinders with new ones.

Every day employees collected empty cylinders, loaded them on a truck and transported to the Oxygen Company in Mattakkuliya for refilling. On certain days when the oxygen consumption was high, this operation has to be doubled. Hospital had its own truck and a group of specially trained skilled employees assigned for the task. Loading and unloading of these jumbo cylinders was a specialised job.

I noticed this operation during my afternoon inspection tour. In fact, the noise made in loading unloading as well as dismounting and mounting cylinders on the walls and the sight itself, to say the least, was a nuisance. Once the truck returned, the refilled cylinders were immediately distributed among the theatres and ICUs. Needless to say this was a hectic task considering the large number, and the spread of theatres and ICUs in the hospital.

There were tensed situations when the truck did not return on time due to a break down, a traffic congestion or an accident on the way. Thought of the delay of the truck with refilled oxygen cylinders gave me many sleepless nights. I was waiting to welcome the irritating noise made when cylinders fell on one another during unloading. While others were cursing, I got a sense of relief as it was an indication that the oxygen truck has arrived. My official residence was in very close proximity to the Merchants Ward where many cylinders were unloaded. No sooner had I heard the clattering sound than I ran to the window to witness the unloading.

As the Director of the country’s largest hospital, I was responsible for the overall smooth functioning of the hospital itself and that of men, material and machinery. And among all, ensuring the continuous and uninterrupted supply of oxygen for patients who were critically ill and those undergoing surgery was foremost.

Majority staff including doctors and nurses did not know the complexity behind the smooth flow of oxygen through the outlet whenever they open the valve to administer oxygen to a patient. Only a handful of people knew the complexity of the ‘oxygen supply operation’ in the hospital. It was a nightmare for me personally and all my predecessors.

While worrying over this cumbersome complex manual operation, I was wondering how fitting this type of oxygen supply for a Teaching Hospital of the magnitude of the National Hospital. My mind was busy in exploring and weighing alternatives.

While listening to the clattering of cylinders and watching the swift movements of workers’ hands in the unloading operation in the middle of the night, with a cup of steaming coffee in my hand, a thought struck my mind. I heard my own voice shouting over the clattering sound of falling cylinders; Hey! Man, be practical, install a Liquid Oxygen Plant in the hospital premises itself.

Early next morning ignoring the supervision tour, I was busy preparing a comprehensive proposal to the Ministry of Health with a clear justification of the investment. Having submitted the proposal followed by a few telephone calls the Ministry responded by approving the proposal.

The proposal was designed to have a Liquid Oxygen Plant with the highest capacity for the hospital and another with less capacity dedicated for the Institute of Cardiology located a little away from the main hospital premises across the street.

A few moons later, a Liquid Oxygen Plant near Ward 13 and a separate smaller plant on the premises of Institute of Cardiology rose to the sky. The copper pipelines were laid connecting all the operating theatres, intensive care units and high dependency units which required continuous uninterrupted supply of oxygen. The project was completed within a matter of a few months providing a great sense of relief to me.

The company which installed the two oxygen tanks is attending to maintenance and repairs. The company regularly monitors the level of consumption and replenishes the tanks. The hospital staff need not intervene.

Needless to mention the relief it brought to me. It was in the year 2006 during which the Hospital installed the two oxygen plants. Since then we did not have to wait for the truck or bother about cylinders. There has not been any loading unloading or clattering of cylinders. I wanted to ensure that my successors would have a permanent reliable source of Oxygen supply for our patients and avoid sleepless nights unlike me and my predecessors.

After the COVID-19 pandemic Oxygen has become the mostly used word among the healthcare workers. After retirement today, I reminisce my time as the Director of NHSL and recall how the disturbed night dawned upon me the idea to install a Liquid Oxygen Plant to ensure the continuous supply of Oxygen to patients gasping for oxygen.

Our neighbouring India is losing thousands of young lives a day due to unavailability of Oxygen. I am happy about the forethought I had 15 years ago long before the term ‘COVID-19 Pandemic’ entered our vocabulary.

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Boosting immune system to fight Covid-19: Is it possible?

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By Saman Gunatilake

Emeritus Professor of Medicine

University of Sri Jayewardenepura

Immune boosting is a trending topic these days with the COVID-19 pandemic. The concept of “immune boosting” is scientifically misleading and often used to market unproven products and therapies. There is no current evidence that any product or practice will contribute to enhanced “immune boosting” protection against COVID-19. This lack of evidence has not stopped wellness gurus with vested interests, and commercial entities from propagating notions of boosting immunity. Internet and popular press are flooded with messages of this nature resulting in an abundance of misinformation circulating online. The public is increasingly going online for health information and questions persist around the kinds of inaccurate information the public is absorbing and the impacts it may be having on health-related decisions and actions.

 

What are Immunity Boosters?

Immunity boosters are products which claim to be able to support your immune system so you aren’t as likely to get sick. Additionally, if you do get sick, taking the supplements will make your illness pass faster. There is no scientific and clinical evidence in humans to support claims of ‘immunity boosting’ foods and other products which supposedly enhance immunity. The body has its own immune system which fights against viral and bacterial invaders. With a normal immune system, we are capable of protecting ourselves against most infections but with certain situations the infection manages to overcome our immune system and cause serious disease and even death. The current Covid 19 pandemic is such a situation. We are in the grip of a spike in infection with over 1000 cases per day seen during the last few days. Total deaths from the pandemic in our country is nearing 700 and the total cases up to now amounts to around 111,800.

With no scientifically established cure for Covid-19 yet and the available recommended treatments limited to severe cases and being not so effective, recovery in most cases has largely been reliant on the human body’s natural defence, the immune system. Fighting the infection by boosting our immune systems had been the buzzword since the beginning of the pandemic. This has led to many misconceptions, misinforming and misleading the public. Improving the diet, taking vitamins and herbal products, lifestyle changes are proposed as ways of doing this. As a result, the market has been flooded with an array of products that claim to boost one’s immunity.

One of the common misconceptions is that high doses vitamin supplements and other minerals and nutrients boost one’s immunity. Ayurvedic concoctions, fruit juices, vitamin pills, zinc tablets have flooded the market with an array of products that claim to boost one’s immunity. Promoters of these products indicate that the body’s natural defences can be strengthened or enhanced by the consumption of certain foods, herbal products or the use of specific products.

Is there robust scientific evidence to support these claims for immune system boosting? The answer is no. Immunology experts believe that there is no way for healthy adults to improve their immunity through foods or other products. The immune system is very complex and these claims about boosting immunity are irrational and unscientific.

 

The Immune System

The immune system is activated by things that enter the body that the body doesn’t recognise as its own such as bacteria, viruses or even particles that cause allergy, like food, drugs and pollen. Most pathogens have a surface protein on them that the immune system recognizes as foreign. These are called antigens. Then the immune system sets in motion a complex process that fights the invader – this is the immune response.

There are two kinds of immune responses in the human body. The innate immune response is the first to kick in and is common among all animals. It is non-specific and immune cells mount an immediate attack on antigens. The response is subsequently replaced by the adaptive immune response, which tailors defences based on the kind of pathogen that is being encountered. The innate immune response consists of white blood cells like neutrophils, macrophages, and monocytes, while the adaptive response involves Lymphocytes -T cells and B cells, as well as antibodies produced by these cells as a specific response to the invader’s antigens. Stimulated immune systems release chemical proteins known as pro-inflammatory cytokines in large numbers, which can cause soreness and pain. So boosting immunity may lead to unwanted inflammations causing swelling, redness and pain locally and fever and other organ damage.

The Internet searchers will find that the myth of “boosting immunity” is extremely pervasive. Of the approaches that claimed to boost immunity, the top ones were diet, fruit, vitamins, antioxidants, probiotics, minerals. Interestingly, vaccines, the only proven method that enhances our immune response to an infection is ranked very low. One of the biggest misconceptions is that consuming more vitamins than required helps the immune system. It has been proven, time and again, that mega-doses of Vitamin C or of any kind of vitamin are not effective on the body at all. Another misconception is that zinc tablets can play a role in mitigating Covid-19. However, this isn’t backed by evidence either.

Zinc is not an immunity booster. It is an essential mineral for the body which is a ‘cofactor’ for a large number of proteins and enzymes. A cofactor is a non-protein chemical compound or metallic ion that is required for an enzyme’s activity as a catalyst. Like zinc, vitamin C is also a cofactor, and is important for the body to function. So, if you have a deficiency of these essential micronutrients, you will face a problem. But, if a person does not have any such deficiency, an excess amount of these taken does not improve one’s chances of fighting off a virus. Vitamin C and Zinc deficiencies are very rare unless someone is starving or following an extreme diet depleted of nutrients. Iron and Iodine deficiencies are seen in communities and more than immune deficiency they cause other problems.

An extremely active immune system, can also be problematic. In severe Covid-19 cases, the body launches an aggressive immune response resulting in the release of a large amount of pro-inflammatory proteins. This is known as a cytokine storm and is one of the common causes of death in Covid-19 patients. A cytokine storm occurs when the body’s immune system goes into an overdrive, killing healthy cells and causing organ failures. Several research studies suggest that the cytokine storm causes lung injury and multi-organ failure. So, if this is the case boosting the immune system in a Covid patient is not a wise thing to do.

 

Market interests add to the myth

The truth is natural immunity in normal people cannot be improved. There are immunocompromised individuals with a poor immunity who are susceptible to infections due to certain illnesses, and how can they stay safe from this highly infectious virus that spreads rapidly? The most effective way is by keeping our communities safe.

 We can do this by attending to the public hygiene of the population exposed to the infection. Providing safe drinking water, providing clean air, providing adequate nutrition — are ways of keeping the people healthy and strong to fight any infections. There are parts of our country fortunately not as bad in India, without access to these basic health requirements. Achieving social distancing in these communities that live in overcrowded households is impossible.

This background, and a new infection with no treatment, led to various interested parties with good and bad intentions in promoting the myth of immune boosting. They have become self-proclaimed experts exploiting this crisis, putting forth all kinds of miraculous non allopathic substitutions. As allopathic medications to be approved, a rigorous procedure has to be observed, they resorted to the easier approach of promoting quick remedies in traditional and herbal products. Unproven ‘natural’ remedies came to the fore in our country in this background where people felt helpless. The vaccine, the only proven way of boosting the immunity of an individual and the population against a specific disease was not available around this time.

There are added dangers in such situations. There may be a lot of drug-drug interactions. If people are consuming allopathic medicines, and then also start consuming these medicinal herbs, the components of the herb will interact with the drug resulting in unknown complications. These unapproved medications can have toxic effects on your kidney, liver and other organs.

Even during the Spanish Flu pandemic in 1918 companies jumped in on the opportunity to hail themselves as immunity boosting drug producers. However, no products were ever proven to be effective in improving immune responses.

Maintaining a normal immune system

A poor immune system is seen in people with certain ailments. Some are born with defects in their immune system and they are known as immunodeficiencies. People with chronic illnesses like diabetes and auto immune disorders are also vulnerable to catch illnesses easily as their immune systems are weak. People on immunosuppressant medications like steroids and cancer drugs also have a weakened immune system and easily catch infections and develop serious complications easily.

Lifestyle is key for keeping your immune system normal and ready to act with an adequate response when necessary. For now, there are no scientifically proven direct links between lifestyle, exercise and enhanced immune function. Researchers are exploring the effects of diet, exercise and stress on the immune response. There are indeed processes that do affect our immune cells and improve their responses. The best one of them, perhaps, is exercise. Many studies have shown that moderate exercise of less than 60 minutes can improve the circulation of anti-inflammatory cytokines, neutrophils, natural killer cells, T cells and B cells. This can work effectively — not for combating diseases at a specific point in time, but to combat stress hormones in general, which can suppress immune cell function. Extremely high intensity exercise leads to a short duration of compromised immunity, increasing risk for disease in this time period. This is one of the reasons marathon runners or professional sports persons tend to catch a fever or cold in the days following a sporting event. Regular exercise is known to improve cardiovascular health, lowers blood pressure, helps control body weight. Therefore, adopting general healthy-living strategies make sense since they are likely to have other proven health benefits. But whether they help to boost the immune system is a controversial issue with no proven answers.

The immune system can also be compromised by many lifestyle habits such as smoking, which is known to affect T and B cells, among a host of other parameters. Diseases like diabetes by themselves result in compromised immune systems. This is why diabetic patients are particularly susceptible to infections. Obesity is another condition with a weak immune system as it predisposes to the development of other illnesses like diabetes and hypertension. There appears to be a connection between poor nutrition and immunity and this is a problem especially in the elderly. Poor nutrition can lead to micronutrient malnutrition, in which a person becomes deficient in some essential vitamins and trace minerals. Deficiency of these can result in a poor immune response to infections. Older people tend to eat less and often have less variety in their food. In them dietary supplements may have some beneficial effects and they should discuss this with their doctors. Taking mega doses of vitamins do not help and can even be harmful.

Every part of your body, including your immune system that fights against infections function better when protected from unwanted damage and bolstered by healthy-living styles. These are – not smoking, taking a diet high in fruit and fibre, exercising regularly, maintaining a healthy weight, avoiding alcohol or consuming in moderation, getting adequate sleep, washing hands regularly, developing good food habits, minimizing stress.

However, there currently exists no evidence of any consumable foods or products being able to induce an improvement in immune function. Although some preparations have been found to alter some components of the immune system, so far there is no evidence that they actually boost your immunity to the point where you are protected against infection. The only scientifically proven way to boost immunity, the immune system, and an immune response is through vaccinations. Vaccines prime your immune system to fight off infections before they take hold in your body.

So, where do we stand today? Vaccines to boost our immunity against Covid, prevention of spread and catching infection by proper wearing of masks, washing hands and maintaining social distance. These are the scientifically proven methods and others appear to be market-driven myths.

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