Coronavirus

FDA Delays Decision On Moderna Vaccine For Adolescents

The agency says it wants to further study the risk of myocarditis, or the inflammation of the heart muscle, in children.

FDA Delays Decision On Moderna Vaccine For Adolescents
Jae C. Hong / AP
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U.S. regulators are delaying their decision on Moderna's COVID-19 vaccine for 12-to-17-year-olds while they study the rare risk of heart inflammation, the company said Sunday.

The FDA told the company Friday evening that its review could last until January, Moderna said.

The company also said it will delay filing a request for emergency-use authorization of a lower dose of the vaccine for 6-to-11-year-olds.

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Heart inflammation is an exceedingly rare risk of both the Pfizer and Moderna vaccines, and is more commonly seen in young men or boys. It’s difficult for clinical trials to detect such a rare problem. And public health officials have repeatedly stressed that COVID-19 itself can cause heart inflammation at higher rates than the rare cases caused by the vaccine.

In the U.S., the Moderna vaccine is authorized for people 18 and older.

Moderna said more than 1.5 million adolescents around the world have received its vaccine and that the number of heart inflammation reports “does not suggest an increased risk" for those under 18.

Moderna also has been testing two shots, one month apart, for children 6-11, at half the dose given to adults.