European Union regulator adds allergic reactions to list of AstraZeneca's vaccine possible side effects From CNN's Antonia Mortensen, Schams Elwazer and Arnaud Siad Boxes containing doses of the Astrazeneca vaccine are pictured inside a refrigerator in Bari, Italy, on March 9. Donato Fasano/Getty Images The EU’s drugs regulator, the European Medicines Agency (EMA), said Friday it was adding severe allergic reactions to the list of possible side effects from the AstraZeneca coronavirus vaccine. The agency’s Pharmacovigilance Risk Assessment Committee (PRAC) “has recommended an update to the product information to include anaphylaxis and hypersensitivity (allergic reactions) as side effects,” the EMA said in a statement.