Health and Human Services Secretary Robert F. Kennedy, Jr. cited a lack of clinical data as the reason to drop the recommendation for healthy kids and pregnant women to continue receiving a COVID vaccine.

The rewriting of government recommendations will make the effort to get vaccine doses into arms exponentially more difficult, experts say.

Health Secretary Robert F. Kennedy Jr.'s intervention in COVID-19 vaccine recommendations without input from a key U.S. CDC advisory panel has sown confusion among physicians and insurers over who should get the shots and whether they will be covered,