https://www.reuters.com/article/us-ema-cyber/uk-to-refine-allergy-warning-on-pfizer-vaccine-sparked-by-two-adverse-reactions-idUSKBN28J2Q7

Britain's medicine regulator warned people with significant allergies not to get Pfizer-BioNTech's COVID-19 vaccine after two people suffered adverse reactions, but was set to give more detailed guidance on Wednesday based on reviews of those cases.