Severe allergic reactions to Pfizer Inc.'s Covid-19 vaccine in a handful of cases have prompted questions over whether certain people should avoid getting inoculated.
The Centers for Disease Control and Prevention has identified six cases of anaphylaxis out of more than 270,000 doses of Pfizer-BioNTech’s vaccine administered as of Dec. 18. Moderna’s vaccine, whose rollout begins this week, contains similar components as Pfizer’s.
But unless someone is allergic to an ingredient in the vaccine, the CDC recommends that they should still get the shot. Anyone with a history of bad reactions to other vaccines or injectible medicines should take certain ...