A large section of India’s population has “hybrid immunity” against Covid-19 and the “strong” resistance it entails is a positive factor in view of emergence of Omicron variant of the virus, a senior scientist has said.
Dr Anurag Agrawal, Senior Scientist and Director of the CSIR-Institute of Genomics and Integrative Biology, New Delhi, said people with best immunity at present are those with “hybrid immunity”.
“Right now people with best immunity are those with hybrid immunity, which is the largest proportion of the country’s population. Even one of Covid-19 vaccine gives you good immunity if you have previously had an infection,” Dr Agrawal told ANI.
He said there are three types of immunity – natural immunity coming from infection, vaccine immunity coming from vaccines and hybrid immunity, in which a person who has previously been infection also gets vaccinated.
“India has all three types of people. A large number of people have been infected, we know that from the ICMR serosurvey. Our big vaccine push was after the second wave, and therefore, these people were infected before they got the vaccine. Hybrid immunity is the strongest of all immunities,” he said.
Talking about people who got fully vaccinated before the second wave arrived in India in April this year, Dr Agrawal, said that their immunity would have declined over time and special focus is needed for needed for boosting their immunity with measures such as booster dose.
“The worst immunity is in people who have not yet been vaccinated. We must take care of very important section of the population like healthcare workers who got double vaccinated before the second wave and have not got infected. They might become susceptible again and we must provide an appropriate wat of protection like a booster (dose). And that is something for us to consider as we meet other priorities,” he said.
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