BREAKING NEWS

The C.D.C. strengthened its Covid booster advice to say all adults "should" get a shot, as scientists race to understand the Omicron variant.

Monday, November 29, 2021 5:42 PM EST

The agency had previously said that Americans over age 50, as well as those ages 18 and older living in long-term care facilities, "should" get booster shots while all other adults "may" decide to do so based on their individual risk.

The shift in language signals a growing concern about Omicron, despite the limited information available about the variant.

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