Call
+918447748545

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.

Read Blog

Monthly Field Day with Patients & Staff: Building Stronger Connections for Better Health

Healthcare outcomes are shaped not only by medical treatments but also by trust, communication and community engagement. As healthcare systems in India move toward preventive and patient-centric models, initiatives that foster meaningful interaction between patients and healthcare professionals are gaining importance. One such initiative is the Monthly Field Day with Patients & Staff.

A field day creates a shared space where patients and healthcare teams interact beyond clinical settings. These interactions humanise healthcare, improve understanding and encourage long-term wellness practices.

Why Community Engagement Matters in Healthcare

Modern healthcare recognises that health is influenced by behaviour, awareness and social support. According to the World Health Organization (WHO) and NITI Aayog, community-based health engagement improves preventive care adoption and patient outcomes.

Field days help bridge the gap between healthcare providers and patients by:

encouraging open dialogue
reducing fear and hesitation
promoting shared responsibility for health

What Is a Monthly Field Day with Patients & Staff?

A Monthly Field Day with Patients & Staff is a structured wellness initiative organised outside the routine clinical environment. It focuses on interaction, education and preventive health activities.

Typical elements include:

basic health screenings
lifestyle education sessions
fitness or relaxation activities
informal conversations with healthcare staff
family and caregiver participation

The aim is to create a supportive and approachable healthcare experience.

Why Monthly Frequency Matters

Consistency is key in behaviour change and preventive health.

Monthly field days:

reinforce health messages regularly
build familiarity and trust
allow continuous follow-up
keep wellness top of mind

According to public health studies, repeated engagement significantly improves health literacy and adherence.

Benefits for Patients

1. Improved Health Awareness

Patients gain better understanding of:

chronic disease management
preventive screenings
nutrition and lifestyle habits

Education in informal settings improves retention.

2. Increased Comfort with Healthcare Teams

Regular interaction reduces anxiety and hesitation around seeking medical care.

Patients are more likely to:

ask questions
follow medical advice
attend follow-ups

3. Early Risk Identification

Field days often include basic screenings that help detect:

high blood pressure
elevated blood sugar
obesity risk

Early identification enables timely intervention.

4. Enhanced Emotional Wellbeing

Social interaction and community activities reduce feelings of isolation, especially among elderly or chronically ill patients.

Benefits for Healthcare Staff

1. Better Understanding of Patient Needs

Direct interaction outside clinical settings helps staff understand patient challenges more holistically.

2. Improved Communication Skills

Informal engagement strengthens empathy and communication effectiveness.

3. Reduced Burnout

Positive patient interaction and community appreciation contribute to staff morale and job satisfaction.

WHO recognises staff wellbeing as a critical factor in healthcare quality.

Role of Field Days in Preventive Healthcare

Preventive healthcare focuses on reducing disease burden before complications arise. Field days support prevention by:

promoting routine screenings
encouraging healthy lifestyle habits
addressing myths and misconceptions
reinforcing long-term care plans

NITI Aayog identifies community engagement as a cornerstone of preventive healthcare strategies.

Activities Commonly Included in Field Days

Health Screening Stations

Blood pressure, blood sugar, BMI and basic assessments.

Wellness Education

Short talks on nutrition, exercise, sleep and stress.

Interactive Sessions

Q&A discussions with doctors, nurses and health educators.

Physical Activities

Group walks, yoga sessions or light exercises.

Family Engagement

Including caregivers improves adherence and support systems.

Impact on Chronic Disease Management

For patients with chronic conditions such as diabetes or hypertension, regular engagement:

improves medication adherence
reinforces lifestyle modification
reduces emergency visits

Lancet studies highlight that community-based interventions improve chronic disease outcomes.

Building Trust Through Transparency

Field days foster trust by:

making healthcare providers approachable
encouraging open dialogue
demonstrating commitment to patient wellbeing

Trust improves treatment adherence and satisfaction.

Role of Data and Feedback

Feedback collected during field days helps healthcare organisations:

identify common concerns
refine wellness programs
personalise future interventions

Data-driven engagement enhances program effectiveness.

Long-Term Impact on Healthcare Outcomes

Organisations that invest in regular patient-staff engagement observe:

higher patient satisfaction
improved preventive screening rates
reduced disease complications
stronger community relationships

According to WHO, patient-centred care models improve health outcomes and system efficiency.

Why Field Days Are Especially Relevant in India

India’s diverse population faces challenges such as:

limited health literacy
delayed care-seeking
chronic disease burden

Community-based initiatives like field days address these challenges through education and trust-building.

Conclusion

A Monthly Field Day with Patients & Staff is more than a community event—it is a strategic preventive healthcare initiative. By fostering open communication, promoting health awareness and strengthening relationships, field days improve patient engagement and staff wellbeing alike. In a healthcare landscape increasingly focused on prevention and community trust, regular field days play a vital role in building healthier, more connected communities.

References

ICMR – Community Health and Preventive Care Reports
National Family Health Survey (NFHS-5) – Health Awareness and Engagement Dat
NITI Aayog – Community-Based Preventive Healthcare Strategies
WHO – Patient-Centred Care and Community Health Guidelines
Lancet – Community Engagement and Health Outcome Studies
Statista – Healthcare Engagement and Preventive Care Trends India
EY-FICCI – Healthcare Workforce and Patient Engagement Reports

Request A Callback

+91

By using this website/app, I confirm that I am at least 18 years old and consent to the processing of my personal data in accordance with the Terms of Service, Privacy Policy, and Declaration.