The centre on Tuesday said door-to-door vaccination against COVID-19 may not be feasible, even as it asked states to ensure 100% saturation of vaccination, which means complete the vaccinations of the priority age group of those above 45 years in the next fortnight, particularly in high burden districts seeing a surge of fresh cases. Despite rapidly rising number of COVID-19 cases, vaccination is yet to pick up in many states. The government is expecting a fast uptick in vaccination from April 1, when all those above 45 years become eligible to receive the shots. But is it time for a change in strategy? Do we need to think out of the box to drive up the numbers?