Indian study finds sharp decrease in Covid antibodies within 4 months of vaccination
A study of 614 fully vaccinated health professionals in India found a "significant" decrease in their COVID antibodies within four months of the first injection.
The results could help the Indian government decide whether to provide booster doses, as some Western countries have done. The drop in antibody levels doesn't necessarily mean those vaccinated will lose their ability to fight disease, as the body's memory cells can still provide significant protection, said the director of a state institute that conducted the study.
“After six months, we should be able to tell you more clearly whether ans when a booster would be needed,” Sanghamita Pati of the Regional Medical Research Centre, based on the eastern city of Bhubaneswar, told Reuters on Tuesday, “ans we would urge similar studies in different areas for pan- India data.”
British researchers said last month that protection from two doses of Pfizer / BioNTech and AstraZeneca vaccines would decrease within six months.
The Indian study, published on Research Square's pre-print platform but still peer-reviewed, is one of the first in the country to include the two main vaccines: Covishield, a licensed version of AstraZeneca's injectable solution, and the nationally developed version Covaxin.
Health officials say scientific research into the scientific development of booster doses is a priority to fully immunize India's 944 million adults. Over 60% of them received at least one dose and 19% received the two required doses.
COVID cases and deaths in India have declined sharply from their peak of more than 400,000 infections in early May. India has reported a total of 33.29 million cases and 443,213 deaths.
Sources:- the live mint
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