A park employee at the Grand Canyon was exposed to hantavirus, and a separate case of exposure to rabies in the park has also been confirmed.

Of the 2,099 people who filled out questionnaires, 97% said they were concerned about air quality around the Tijuana River ...

A coalition of doctors’ groups and public health organizations sued the U.S. government on Monday over the decision to stop recommending COVID-19 vaccinations for most children and pregnant women.