Epidemiology

Sunshine may hold healing rays for a variety of autoimmune diseases such as multiple sclerosis. Scientists are turning this surprising discovery into treatments

As U.S. childhood vaccination rates sway on a “knife’s edge,” new 25-year projections reveal how slight changes in national immunization could improve—or drastically reverse—the prevalence of measles, polio, rubella and diphtheria

As the bird flu outbreak continues, public health outreach to farm workers is meeting fear and resistance amid Trump’s attacks on immigrants

The Trump administration’s mass federal firings include the scientific investigators who make dangerous workplaces safe for millions of people

A team of researchers traced the wild animal source of the mpox virus to the fire-footed rope squirrel

Tariffs on Mexico and Canada won’t stop the demand for addictive drugs

Outpatient flu visits and hospitalizations are higher than at any time in the past 15 years

Low vaccination rates and undetected infections are driving the measles outbreak in West Texas

Bird flu headlines include three new human cases, millions of dead birds in poultry flocks and new personnel moves from the Trump administration

With hospitalizations and at least nine confirmed cases, health officials race to contain a growing outbreak in a community with low vaccination

"I call this virus a terrorist," says one egg farmer after millions of chickens have died in recent weeks

Nearly 119,000 birds have been culled at a farm in California after a bird flu called H5N9 was detected among the poultry