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Hepatitis A outbreak infects thousands of travelers at popular destinations

FDA approves first twice-yearly injection that prevents HIV infection

New COVID variant may cause 'razor blade throat' — here's what to know

Measles cases continue to climb ahead of summer travel: Get the latest numbers

CDC removes COVID vaccine recommendation for healthy children and pregnant women

Cold sores may play role in Alzheimer's development, new research reveals

4 biggest handwashing mistakes that could increase germs and viruses

Measles exposure warning issued for Newark Airport as officials urge vaccination

Alzheimer's disease could be prevented by antiviral drug already on market

Officials in West Coast state sound alarm after traveler diagnosed with highly contagious viral disease