The FDA made the decision comes without consulting its committee of independent vaccine experts.
dose compared with those who received just three shots. The study, which has not undergone peer review, examined the medical records of more than 500,000 people from January through February at Clalit Health Services, Israel's largest health-care provider.
John Moore, a professor or microbiology and immunology at Weill Cornell Medical College, criticized Moderna's request for a fourth dose for all adults as an aggressive, blanket application that doesn't distinguish between the different needs that older and younger people have. The authorization of fourth shots comes as a more contagious omicron subvariant, BA.2, has caused new waves of infection in major European nations and China, which is battling its worst outbreak since 2020. BA.2 has gained ground in the U.S. since February and is expected to become the dominant variant here in the coming weeks. White House chief medical advisor Dr. Anthony Fauci has said infections might increase in the U.S. due to BA.2, thoughBA.
"A fourth vaccination of healthy young health-care workers may have only marginal benefits," Dr. Gili Regev-Yochay and a team of scientists from Sheba Medical Center and Israel's Ministry of Health who conducted the study wrote in a letter to the New England Journal of Medicine this month.
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