Published: Apr 17, 2021, 23:35 IST | Updated: Apr 17, 2021, 23:35 IST
The CEO of Pfizer Albert Bourla says that there is likely a need for a third dose of booster shot somewhere between 6 and 12 months and then form there will be annual revaccination but all of that needs to be confirmed. Health official says the emergence of the new variant is the primary reason.