Overall, those who had a severe reaction recovered well, the CDC said, although five of them ended up in intensive care. In most cases, the reaction occurred shortly after vaccination. Nine out of ten cases had a history of allergies, especially to drugs. One person had a food allergy. There are no known deaths at the CDC.
According to the authority, preliminary data show an average of 2.5 severe allergic reactions per 1 million vaccinations. Previous vaccinations with the Pfizer / BioNTech vaccine in the United States have shown approximately 11 cases per 1 million injections, according to the CDC. Also, the symptoms of allergic reactions to the Moderna vaccine and that of Pfizer / BioNTech would be similar.
The CDC has given new advice to US injection sites based on the data. For example, there should be a better test for possible allergies, they should have enough allergy medicine at home and people who have an allergic reaction should not get a second injection.
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