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Published on: Apr 20, 2020
3 minute read
By: Dr Rajan Choudhary

Is Herd Immunity A Valid Strategy For COVID 19?

Yesterday we explained you what Herd Immunity means and how it works, today we will take the discussion further to determine whether it is effective and can be recommended in the current context.

COVID-19 currently does not have a cure or a vaccine. Lockdown is the only strategy that appears to be working. Could implementing policies that encourages herd immunity be used to accelerate immunity in the population without the need for a vaccine?

INFECTIVITY

For the strategy to work we need to know a few things about the virus. How infective is it? In one of our earliest blogs we discussed infectivity at length and determined that the R0 (infectivity) may be between 2 and 3. This means each person with the virus can infect around 2-3 people at a time. Whilst this is not as high as Mumps (10-12) it is much higher than the common flu. The higher the R0 the more people that need to be immunised before herd immunity is achieved. For COVID it is estimated that 70% of the population need to be infected.

This is based off our current testing. Due to shortages in testing kits, only testing those that have a high likelihood of being infected and poorly organised testing infrastructure in some countries, we are likely underestimating. The number of people infected may be much higher as we are missing those that are asymptomatic but still have the disease and are still passing the disease on.

MORTALITY

Secondly, we need to know the mortality from COVID-19. Early estimates of mortality were as high as 10%, as we had little data on how many people were truly infected, but as the number of infected cases rose, and testing amongst the infected and symptomatic population rose, a more accurate mortality has been found to be around 1%. There is a risk we may still be underestimating the true mortality, as some cities have noted a spike in cardiac deaths, and some evidence supports possible cardiac damage due to COVID. But from the data we have, we know its mortality is lower than MERS (34%) and SARS (10%) but more than influenza (0.1%).

estimates of the COVID-19 case fatality rate

Whilst we have some data on who is likely to suffer from severe COVID symptoms (elderly, immunocompromised, people with heart or lung problems) we still cannot accurately determine who will get severe COVID in the “low risk” population. Simply because someone is young and healthy does not mean they will not die from COVID.

LENGTH OF IMMUNITY

Third we need to know how long this immunity will last. Similar coronaviruses responsible for the common cold usually create immunity that lasts for a few months, which is why we often get the cold repeatedly. A virus is also very prone to mutations that can change the structure and functions of its proteins, proteins responsible for tagging, latching on to and entering cells. If the structure of these proteins changes enough, then our antibodies will not be able to bind on, and new types of antibodies will have to be made with a slightly different structure. This effectively means our bodies have to start from step 1 again to create immunity, and we have to make new vaccines. This mutation rate is why we have to make new vaccines every season for the flu.

LONG TERM COMPLICATIONS

Finally, we need to know if there are any long-term implications from a viral infection. Again, this is something we do not know yet, as the virus has only been around for a few months. There may be implications for the cardiovascular system, long term breathing problems or more. And even if the complication rate appears relatively low (say, 1%), if millions of people are allowed to get infected, by definitions thousands or tens of thousands of people will have these complications, complications that can lead to issues later in life or an early death.

CONCLUSION

So, is herd immunity a viable strategy for COVID? Without a safe vaccine the general consensus appears to be no.

We don’t know how infective the virus really is or how many people it has infected

A 1% death rate is still very high. This means for every 100 people to be infected; one will die. This would mean hundreds of thousands of people dead in a country with a population over 10 million. It is unacceptably high.

If the death rate is 1%, then hospitalisation rate is likely higher. Almost all countries do not have capacity to have 1% of the population in hospital. Overwhelming the healthcare system will lead to poorer care, and worse care for those who do not have COVID. Leading to more people coming to serious harm or dying as a result of poor healthcare, not because of COVID.

We don’t know the long-term effects of COVID. By purposefully infecting people instead of waiting for a vaccine we may be causing unnecessary damage to a person’s health that only becomes apparent later in life. But this is speculation as we do not currently know if COVID has long term effects,

We don’t know if all of the risks above will amount to anything. The immunity may not last long enough, leading to another spike in infections and mortality.

Mass vaccination appears to be the safest strategy. And though human clinical trials have started on a number of vaccines, we are still months away from deployment. Until then we should not come out of lockdown prematurely, not until we have received an unbiased assessment from public health officials that states it is safe.

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How Weekly Onsite Yoga Benefits Corporate Wellness: A Preventive Approach to Workplace Health

Corporate wellness programs are evolving rapidly. Traditional initiatives such as annual health checkups and gym memberships are no longer sufficient to address modern workplace health challenges. Rising stress levels, sedentary routines and burnout have pushed organisations to adopt preventive, sustainable wellness strategies. One of the most effective among these is weekly onsite yoga.

Understanding how onsite yoga weekly benefits corporate wellness highlights why this ancient practice has become a modern workplace necessity. Yoga addresses both physical and mental health, making it uniquely suited for today’s high-pressure corporate environments.

Why Corporate Wellness Needs Preventive Solutions

According to the Indian Council of Medical Research (ICMR) and workplace health reports, lifestyle-related disorders such as hypertension, diabetes, obesity and mental health conditions are increasingly affecting working professionals.

Key workplace health challenges include:

prolonged sitting
poor posture
chronic stress
sleep disturbances
reduced physical activity

Preventive interventions are essential to reverse these trends before they result in chronic disease and productivity loss.

What Is Weekly Onsite Yoga?

Weekly onsite yoga involves structured yoga sessions conducted at the workplace by trained instructors. These sessions typically include:

stretching and mobility exercises
breathing techniques
simple yoga postures
relaxation and mindfulness practices

Sessions are designed to be inclusive, requiring no prior yoga experience.

Why Weekly Frequency Matters

Consistency is the foundation of wellness.

Weekly yoga sessions:

reinforce healthy habits
prevent accumulation of stress
support gradual physical improvement
encourage long-term participation

Unlike one-time workshops, weekly programs deliver sustained impact.

Physical Health Benefits of Onsite Yoga

Reduces Musculoskeletal Problems

Desk-based work often leads to back pain, neck stiffness and joint discomfort. Yoga improves:

posture
flexibility
muscle strength

This reduces work-related musculoskeletal disorders.

Improves Cardiovascular and Metabolic Health

Regular yoga practice supports:

blood pressure regulation
improved circulation
better glucose control

WHO recognises yoga and similar mind-body practices as beneficial for lifestyle disease prevention.

Enhances Energy Levels

Yoga improves oxygenation and circulation, reducing fatigue and mid-day energy crashes.

Mental Health Benefits in the Workplace

Reduces Stress and Burnout

Yoga lowers cortisol levels and activates the parasympathetic nervous system, promoting relaxation.

This helps employees:

manage deadlines calmly
recover from mental fatigue
reduce anxiety

Improves Focus and Cognitive Performance

Breathing and mindfulness practices improve:

attention span
mental clarity
decision-making

Better focus directly translates into improved productivity.

Supports Emotional Wellbeing

Regular yoga enhances emotional regulation, reducing irritability and improving workplace relationships.

Impact on Productivity and Performance

Healthy employees perform better.

Weekly onsite yoga contributes to:

reduced absenteeism
fewer stress-related sick days
improved work engagement
sustained productivity

EY-FICCI corporate wellness studies show that preventive wellness programs deliver measurable performance benefits.

Role in Building a Wellness-Oriented Culture

Onsite yoga sends a strong message that employee wellbeing is a priority.

It helps organisations:

foster trust and engagement
encourage work-life balance
create a supportive environment

Wellness culture improves retention and employer branding.

Inclusivity and Accessibility

One of yoga’s biggest strengths is adaptability.

Onsite yoga:

suits all age groups
accommodates different fitness levels
requires minimal equipment
can be modified for health conditions

This inclusivity ensures broad participation.

Cost-Effectiveness and ROI

Compared to advanced medical interventions, onsite yoga is:

low-cost
scalable
preventive rather than reactive

By reducing long-term healthcare costs, yoga delivers high return on investment for employers.

Yoga as Part of Preventive Healthcare

Preventive healthcare focuses on reducing risk factors before disease develops.

Weekly onsite yoga supports prevention by:

lowering stress-related disease risk
improving metabolic health
encouraging active lifestyles
supporting mental resilience

NITI Aayog recognises workplace wellness as a key lever for national health improvement.

Integration with Corporate Wellness Programs

Onsite yoga works best when integrated with:

preventive health checkups
stress management initiatives
nutrition education
digital health tracking

Integrated programs deliver stronger outcomes than isolated activities.

Overcoming Common Barriers

Some organisations hesitate due to:

time constraints
perceived lack of interest
space concerns

However, short, well-structured sessions (30–45 minutes) overcome these challenges effectively.

Long-Term Impact on Organisations

Organisations that adopt weekly onsite yoga observe:

healthier workforce
reduced burnout
improved morale
better long-term healthcare outcomes

Lancet workplace health studies show that consistent mind-body interventions yield benefits within 6–12 months.

Conclusion

Understanding how onsite yoga weekly benefits corporate wellness reveals why it is more than a fitness activity—it is a preventive health strategy. By addressing physical strain, mental stress and lifestyle risks, weekly onsite yoga supports healthier employees, stronger productivity and sustainable wellness culture. In today’s demanding corporate environment, investing in regular yoga sessions is an investment in long-term organisational resilience and success.

References

ICMR – Workplace Health and Lifestyle Disease Reports
National Family Health Survey (NFHS-5) – Adult Health and Stress Indicators
NITI Aayog – Preventive Healthcare and Workplace Wellness Strategy
WHO – Physical Activity, Yoga and Mental Health Guideline
Lancet – Mind-Body Interventions and Workplace Health Outcomes
EY-FICCI – Corporate Wellness and Productivity Report
Statista – Corporate Wellness Program Trends India

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