
Washington, D.C.
The U.S. Department of Health and Human Services has appointed epidemiologist Martin Kulldorff as its new chief science officer, a move drawing attention across the public health community. Kulldorff, a Swedish-born biostatistician with decades of experience and over 200 publications, previously served on the federal vaccine advisory committee and is known for his role in the Great Barrington Declaration, which opposed strict COVID-19 lockdowns.
His appointment comes as HHS Secretary Robert F. Kennedy Jr. overhauls the department’s advisory structure. Supporters highlight Kulldorff’s expertise in statistical analysis and vaccine safety monitoring, while critics express concern that his past positions could influence federal vaccine guidance and public trust.
During his tenure on the advisory panel, Kulldorff oversaw several controversial decisions, including limiting use of certain vaccines and framing COVID-19 vaccination as a personal choice rather than a public mandate. As chief science officer, he will advise on policy, research, and department-wide planning, with his approach closely watched by public health officials and medical organizations nationwide.
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