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For the Third Time, W.H.O. Declines to Declare the Ebola Outbreak an Emergency

Quick work, luck saved Red Sox slugger Ortiz, surgeons say in first interview

Eager to Limit Exemptions to Vaccination, States Face Staunch Resistance

New York, epicenter of measles outbreak, bans religious exemptions for vaccines

Fecal Transplant Is Linked to a Patient’s Death, the F.D.A. Warns

Fecal Transplant Is Linked to a Patient’s Death, the F.D.A. Warns

A rare skin disease left a man isolated and alone. Surgery is helping to give him back his life.

Tracking Your Sleep? Beware Orthosomnia and Other Risks

Jessica Biel lobbied alongside a prominent anti-vaxxer, but says she supports vaccines

Depo-Provera, an Injectable Contraceptive, Does Not Raise H.I.V. Risk

N.I.H. Head Calls for End to All-Male Panels of Scientists

Dr. Kenneth Forde, Surgeon Who Fostered Cancer Screening, Dies at 85

NIH director will no longer speak on all-male science panels