UK issues allergy warning over Pfizer Covid-19 vaccine after two adverse reactions

Britain began mass vaccinating its population on Tuesday in a global drive that poses one of the biggest logistical challenges in peacetime history, starting with the elderly and frontline workers

National Health Service medical director Stephen Powis said the advice had been changed after two NHS workers reported anaphylactoid reactions associated with receiving the vaccine.

“As is common with new vaccines the MHRA (regulator) have 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.

The MHRA said it would seek further information, and Pfizer and BioNTech said they were supporting the MHRA’s investigation.

The Medicines and Healthcare products Regulatory Agency (MHRA) was the first in the world to approve the vaccine, developed by Germany’s BioNTech and Pfizer, last week, while the U.S. Food and Drug Administration (FDA) and European Medicines Agency (EMA) continue to assess the data.

“Last evening, we were looking at two case reports of allergic reactions. We know from the very extensive clinical trials that this wasn’t a feature,” MHRA Chief Executive June Raine told lawmakers.

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