<div id="readability-page-1">04:26 PM EST, 12/01/2025 (MT Newswires) -- Shares of Moderna ( MRNA ) and other major drugmakers declined on Monday's close after the US Food and Drug Administration reportedly plans to tighten vaccine approval.Vinay Prasad, the FDA's chief medical and scientific officer, claimed in an internal memo that COVID-19 vaccines led to at least 10 child deaths, according to media reports in the previous days.Prasad said he would be proposing a range of new oversight and review mechanisms for vaccines, the reports added, including The New York Times.The Department of Health and Human Services, which governs the FDA, did not immediately respond to MT Newswires' request for comment.Moderna ( MRNA ) shares fell 7%, Novavax ( NVAX ) dropped 5.1%, BioNTech (BNTX) slid 5.6% and Pfizer ( PFE ) declined 1.8% at close. MT Newswires does not provide investment advice. Unauthorized reproduction is strictly prohibited.</div>

MRNA

Moderna and other pharmaceutical stocks fell after reports that the US FDA plans to tighten vaccine approval processes. This follows claims by FDA's chief medical officer, Vinay Prasad, that COVID-19 vaccines were linked to child deaths. Moderna shares dropped 7%, Novavax 5.1%, BioNTech 5.6%, and Pfizer 1.8%.

Moderna, Other Pharma Stocks Close Lower After US FDA Reportedly Plans to Toughen Vaccine Approval