Young men especially at risk of developing chronic hives, researchers find.
People who receive Moderna's COVID-19 vaccine have a greater risk of developing chronic hives, according to researchers in Denmark.
The Danish Medicines Agency review of data from Denmark and the European Union validated a safety signal that arose for chronic hives, or chronic urticaria, and Moderna's shot, the agency said on March 20.
The study found that in Denmark, it was expected based on background rates of chronic hives that 175 people who received Pfizer's shot would experience chronic hives following vaccination and that 18 people who received Moderna's shot would experience the issue.
The risk of developing chronic hives was calculated to be three times higher for Moderna recipients, compared to the general population.
U.S. researchers reported in 2022 three new chronic hives cases after Pfizer and Moderna vaccination, including one case in a 24-year-old woman who received a booster of Moderna despite suffering persistent skin problems after the first and second doses.
Swiss researchers in 2023 said they analyzed new chronic hives cases after Pfizer and Moderna vaccination and that the results suggested a link between a booster dose of Moderna's vaccine and the health problem.
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