Swedish health authorities have suspended the use of the Moderna Covid vaccine in people aged 30 and under due to concerns about side effects, including inflammation of the heart muscle. The Independent has the story.
The reason for the pausing is “signals of an increased risk of side effects such as inflammation of the heart muscle or the pericardium” – the double-walled sac containing the heart and the roots of the main vessels, Sweden’s Public Health Agency said in a statement. “The risk of being affected is very small.”
Anders Tegnell, Sweden’s Chief Epidemiologist, said they “follow the situation closely and act quickly to ensure that vaccinations against Covid are always as safe as possible and at the same time provide effective protection” against the disease.
In July, the European Medicines Agency recommended authorising Moderna’s Covid vaccine for children ages 12 to 17, the first time the shot has been authorised for people under 18.
Moderna’s vaccine was given the green light for use in anyone 18 and over across the 27-nation European Union in January. It has also been licensed in countries including Britain, Canada and the U.S., but so far its use hasn’t been extended to children. To date, the Pfizer vaccine is the only one approved for children under 18 in Europe and North America.
Hundreds of millions of Moderna doses already have been administered to adults. In a study of more than 3,700 children ages 12 to 17, the vaccine triggered the same signs of immune protection, and no Covid diagnoses arose in the vaccinated group compared with four cases among those given dummy shots.
Sore arms, headache and fatigue were the most common side effects in the young vaccine recipients, the same ones as for adults.
U.S. and European regulators caution, however, that both the Moderna and Pfizer vaccines appear linked to a rare reaction in teenagers and young adults — chest pain and heart inflammation.
The Swedish health authorities said that the heart symptoms “usually go away on their own,” but they must be assessed by a doctor. The conditions are most common among young men, in connection with, for example, viral infections such as Covid. In 2019, approximately 300 people under the age of 30 were treated in hospital with myocarditis.
Data point to an increased incidence also in connection with vaccination against Covid, mainly in adolescents and young adults and mainly in boys and men.
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