Agency says vaccinations must be immediately stepped up across Europe and central Asia.

Reusing syringes leads to millions being infected with disease each year, group says.

The 15-minute detection test is aimed at further containing the virus.

Disease detected at Myanmar-India border poses "enormous threat" to global health, say scientists.

A compound has performed exceedingly well in monkeys to block H.I.V.

State makes recommendation as it grapples with outbreak that has sickened more than 100.

The shortage of blood is forcing patients to turn to the black market.

Uptick in new cases of the disease in West Africa's worst-hit countries ends series of encouraging declines.

Life-threatening infections caused by C. difficile bacteria sicken thousands a year, say health officials.