US moves to simplify Covid vaccines into yearly dose to target variants

The FDA asked its scientific advisers Thursday to help chalk out plan to move to a flu shot-like schedule for coronavirusThe US is poised to make Covid-19 vaccinations more like a yearly flu shot, a major shift in strategy despite a long list of questions about how to best protect against a still rapidly mutating virus.The Food and Drug Administration asked its scientific advisers Thursday to help lay the groundwork for switching to once-a-year boosters for most Americans – and how and when to periodically update the shots’ recipe.