On Tuesday afternoon, the U.S. government recommended that almost every American begin taking a new annual vaccine for Covid, a milestone in the nation’s three-year battle against the virus.Apoorva Mandavilli, a science and global health reporter for The New York Times, explains why the era of booster shots is now over and how to navigate this latest uptick in infections.Guest: Apoorva Mandavilli, a science and global health reporter for The New York Times.Background reading: 

• The C.D.C. recommended all Americans aged 6 months and older should get at least one dose of new Covid vaccines.
• Covid continues to rise, but experts remain optimistic.

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