But concerns linger. Three of four people eligible for the third shot have still not turned up for their booster jab, and even if the highest pace of administering jabs is sustained (2.65 million shots per day on average), seven out of 10 people will still remain without their precaution doses when the drive ends next week. This is a problem, given that studies have now conclusively shown that immunity from two doses begins waning after four-to-six months. Therefore, the government has to find ways to counteract the sense of complacency and fatigue that has seeped into the general public, undertake massive public awareness programmes (on the lines of the interventions that helped curb vaccine hesitancy and problems of access during the first two doses), and, if needed, extend the free booster drive. Only this will ensure continued protection from newer variants of Sars-Cov-2 for all Indians.