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Big Drop In Antibodies Within 4 Months Of Covid Shot, Says Study In India





Covidcases and deaths in India have come down sharply.

Bhubaneswar:

A study of 614 fully vaccinated health workers in India found a “significant” drop in their COVID-fighting antibodies within four months of the first shot. The findings could help the government decide whether to provide booster doses as some Western countries have done.

Waning antibodies do not necessarily mean that immunised people lose their ability to counter the disease, as the body’s memory cells may still kick in to offer substantial protection, said the director of a state-run institute that did the study.

“After six months, we should be able to tell you more clearly whether and when a booster would be needed,” Sanghamitra Pati of the Regional Medical Research Centre, based in Bhubaneswar, told Reuters on Tuesday. “And we would urge similar studies in different areas for pan-India data.”

British researchers said last month that protection offered by two doses of the Pfizer/BioNTech and the AstraZeneca vaccines begins to fade within six months.

The study, published in the Research Square pre-print platform but yet to be peer reviewed, is one of the first such done in the country involving its main two vaccines – Covishield, a licensed version of the AstraZeneca shot, and domestically developed Covaxin.

Health officials say though they are studying the evolving science on booster doses, the priority is to fully immunise India’s 944 million adults. More than 60 per cent of them have received at least one dose and 19 per cent┬áthe required two doses.

Covid cases and deaths in India have come down sharply since a peak of more than 400,000 infections in early May. India has reported 33.29 million cases in total and 443,213 deaths.





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