LONDON — British regulators warned that people with a history of serious allergic reactions shouldn’t receive the new Pfizer-BioNTech vaccine while they investigate two adverse reactions on the first day of the country’s mass vaccination program.
The U.K.’s Medical and Healthcare Products Regulatory Agency is looking into whether the reactions were linked to the vaccine. The two people affected were staff members with the National Health Service who had a history of allergies, and both are recovering. Authorities have not specified their reactions.
In the meantime, the regulator has issued the warning for anyone with a significant allergic reaction to a vaccine, medicine or food. That includes anyone who has been told to carry an adrenaline shot or others who have had potentially fatal allergic reactions.