FDA vaccine advisers say a plan for updating Covid-19 shots is needed

The future of Covid-19 vaccines -- including when and how often booster doses might be needed -- remains unclear and 'complex,' according to advisers to the US Food and Drug Administration. The FDA's Vaccines and Related Biological Products Advisory Committee (VRBPAC) detailed in a meeting Wednesday how emerging coronavirus variants and the future use of Covid-19 booster shots would be approached and coordinated -- and the advisers plan to continue their conversation in the coming months.