Gap between AstraZeneca doses may be widened amid vaccine supply uncertainty

India on May 13 increased the gap to 12-16 weeks citing vaccine shortage. ‘Real-world data from the UK’ reportedlyshowed the AstraZeneca vaccine is 65-88 percent effective if the interval is three months or more.

With no signs of additional doses of Covishield, the AstraZeneca type vaccine manufactured by the Serum Institute, arriving anytime soon , there is uncertainty when the over 1.3 million people above 65 would be able to take their second shots.