Herd immunity may seem like a viable solution at a time when COVID-19 cases continue to surge, but according to renowned virologists and epidemiologists, natural immunity to the SARS-CoV-2 virus lasts only three to nine months. That said, practicing herd immunity would mean that almost 70% of the population would have to get reinfected every nine months. Apart from this, people falling under the category of most vulnerable would become all the more susceptible to the infection, increasing the rate of mortality.
Besides that, while many believe in the idea of herd immunity, experts are still unsure about the number of recovered patients that need to be in the community to break the chain of the COVID-19 transmissions.
In an interview with PTI, Ramanan Laxminarayan, founder and director of the Center for Disease Dynamics, Economics & Policy (CDDEP) in the US said, “Our best bet is still in the 60-70 per cent range but this is based on theory, and not on specific information we have about duration of immune protection following infection.”