US expected to authorize mix-and-match COVID booster shots

WASHINGTON (AP) — Federal regulators are expected to authorize the mixing and matching of COVID-19 booster shots this week in an effort to provide flexibility for those seeking to maintain protection against the coronavirus. The upcoming announcement by the Food and Drug Administration is likely to come along with authorization for boosters of the Moderna and Johnson & Johnson shots. It follows the authorization of a third dose for the Pfizer vaccine for many Americans last month. The move was previewed Tuesday by a U.S. health official familiar with the matter who was not authorized to speak publicly ahead of the announcement.