A survey in Delhi and Mumbai found out that every fourth person was corona positive or exposed to the coronavirus. In Mumbai, it was seen that half the slum was affected by the coronavirus. Most of the cases were asymptomatic or immune to the disease as they have started getting herd immunity against the disease.
Herd immunity is developed in two ways; either by getting immunized or else by gaining natural immunity. In this case, most of the people are getting natural immunity which is the best way. “It could be possible, especially if you see the latest serosurveys in Delhi and Mumbai, that people have developed immunity. Though data alone is not enough, and we need more and more serosurveys to evaluate any possibility of herd immunity. I think only a serosurvey could reveal how many people have been exposed to the virus and are not showing any symptoms,” said leading epidemiologist Dr Jayaprakash Muliyil.
A survey in Mumbai showed that 57 per cent of slum residents and 16 per cent of non-slum residents have been infected by the coronavirus.
“Herd immunity refers to the proportion of the population that needs to be immune to a virus to provide indirect protection to people in that group who are not immune to it. This can be achieved in two ways – either a large proportion of the population gets infected naturally (in the case of Covid-19, it would be over 70 per cent), or through a protected vaccine,” said Dr Priya Luthra, principal investigator in viral diseases research in New York’s Trudeau.
Most of the leading medical experts believe that India is reaching a herd immunity and through natural immunization rather than artificial immunization. This is the reason why there are more asymptomatic patients in the country rather than full-blown coronavirus cases.
However, India along with the rest of the world is still waiting to find the coronavirus vaccine which will help save the lives of so many people who have been infected.