Vaccines can sometimes cause allergic reactions, but they are usually rare and short-lived.British regulators are looking into reports of allergic reactions in two people who received the new Pfizer COVID-19 vaccine Tuesday, the first day of a vaccination program.
In the meantime, they're telling people to skip the vaccine if they've had a history of serious allergic reactions.A look at allergic reactions to vaccines:HOW OFTEN DO THEY HAPPEN?Allergic reactions can occur with numerous vaccines and experts say they are not unexpected.
In the Pfizer-BioNTech study of 42,000 people, the rate was about the same in those who got the coronavirus vaccine versus those who got a dummy shot.