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Considered the founder of molecular epidemiology, he worked with Frederick P. Li to identify a hereditary disorder that increased the risk of developing cancer at a young age.

Free apps from Google, Samsung and Apple can help you track your diet, exercise and well-being -- and provide vital information during emergencies.

Limerence is more than a crush, psychologists say, and it can persist for months or years.

Modern Love in miniature, featuring reader-submitted stories of no more than 100 words.

UnitedHealth Group, CVS Health and Cigna are suing states over new laws targeting their pharmacy businesses.

A British nonprofit helps patients escape the stress and boredom of ward life by watching the latest blockbusters.

The human microbiome is essential to our health, but scientists have only begun to understand why. Two researchers set out to map this largely uncharted terrain.

A lawsuit filed by Children's Health Defense, an organization founded by Robert F. Kennedy Jr., claims that vaccines caused the twins' deaths. But a grand jury in Idaho has indicted her on charges of suffocating them.

Trump promised a record display of some 850,000 pyrotechnics for the country's 250th birthday. The Park Service warned it could get dirty.

As the administration works to expand gun rights, hospitals and community groups have lost funding, and reports on preventing firearm injuries have vanished from government websites.