UK investigates possible allergic reactions to COVID-19 vaccine shot

LONDON - UK regulators say people who have a "significant history" of allergic reactions shouldn't receive the new Pfizer-BioNTech coronavirus vaccine while they investigate two adverse reactions that occurred on the first day of the country's mass vaccination program.

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Professor Stephen Powis, national medical director for the National Health Service in England, said health authorities were acting on a recommendation from the Medical and Healthcare Products Regulatory Agency, the nation's medicines regulator.

"As is common with new vaccines, the MHRA has advised, on a precautionary basis, that people with a significant history of allergic reactions do not receive this vaccination after two people with a history of significant allergic reactions responded adversely yesterday," Powis said in a statement. "Both are recovering well."