In-depth

Risk factors

HIV/AIDS

More than 39 million people are living with HIV — the virus that causes AIDS. Millions more are lipkely to become infected in the next decade. More than 39 million people are living with HIV — the virus that causes AIDS. Millions more are likely to become infected in the next decade.

Tests and diagnosis

Upper endoscopy

Find out what to expect during your endoscopy exam.

Aug. 20, 2011