The US Food and Drug Administration on Tuesday did not approve a needle-free epinephrine for treatment of severe allergic reactions, a move that drugmaker ARS Pharmaceuticals called surprising.

They are different from severe and immediate allergic reactions, which occur within the first four hours of getting vaccinated. The findings appeared Wednesday in the Journal of the American ...

The U.K. regulator has warned people with a history of “significant allergic reactions” not to get the Pfizer–BioNTech COVID-19 vaccine, after two health-care workers had adverse reactions ...