The new booster shot would be an update to Pfizer's current version of the shot, which was designed for the original strain of the coronavirus. Nam Y. Huh/AP hide caption
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The Biden administration plans to offer updated booster shots in the fall. Mario Tama/Getty Images hide caption
Summer boosters for people under 50 shelved in favor of updated boosters in the fall
Tuesday
A health care worker prepares the current COVID vaccine booster shots from Moderna in February. The company says a bivalent vaccine that combines the original strain with the omicron strain is the lead candidate for a fall vaccination campaign. Bloomberg/Bloomberg via Getty Images hide caption