AIIMS: Covaxin effective for 9-12 months, no serious side-effects so far
Mathematical calculations indicate that Covaxin may provide immunity against Covid-19 for 9 to 12 months, and there may be a booster shot after this period elapses, Y.K. Gupta, the President of AIIMS Bhopal and Jammu, told IANS.Stressing on…