The Food and Drug Administration approved new mRNA coronavirus vaccines Thursday, clearing the way for shots manufactured by Pfizer-BioNTech and Moderna to start hitting pharmacy shelves and doctor’s offices within a week.

Health officials encourage annual vaccination against the coronavirus, similar to yearly flu shots. Everyone 6 months and older should receive a new vaccine, the Centers for Disease Control and Prevention recommends. ...Our scientific understanding of coronavirus vaccines has evolved since they debuted in late 2020. Here’s what to know about the new vaccines.

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