Life-threatening allergic reactions to the Modern Covid-19 vaccine occur “rarely,” said the United States Centers for Disease Control and Prevention (CDC) after analyzing data from millions of people who received their first injection.
The CDC analyzed 4,041,396 people across the country who received the first doses of the Moderna vaccine between December 21 and January 10.
Overall, 1,266 people (0.03 percent) were reported to have some form of “unfavorable” reaction.
Among them, 10 had a strong life-threatening allergic reaction, which is 2.5 cases per million doses administered, the agency said, citing the Vaccine Adverse Event Notification System. This group included nine people with a documented history of allergy and allergic reactions to drugs, contrast media or food.
“Among eight people with available follow-up information, all recovered or were discharged home,” said the CDC. All 10 strong allergic reactions occurred in women.
No allergy-related deaths have been reported.
Several people needed medical attention after receiving the first dose of the Moderna vaccine in California earlier this month. Some of these cases have been reported by the local media as allergic reactions. The state briefly stopped using the vaccine, but resumed use after California’s top epidemiologist, Erica Pan, said health officials “He found no scientific basis to continue the pause.”
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As for the Pfizer / BioNTech vaccine, the CDC said it triggered strong allergic reactions in 21 people (11.1 cases per million doses), after analyzing 1,893,360 first doses administered between December 14 and 23. As with Moderna, no allergy-related deaths have been reported.
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