The Centers for Disease Control and Prevention (CDC) on Thursday determined that vials found at a Pennsylvania facility this week with labels reading “smallpox” did not contain the virus that causes ...

Vials labeled 'smallpox' that were discovered in a freezer in a Philadelphia laboratory don't contain any traces of the deadly virus, federal health officials reveals. The Centers for Disease Control ...

Vials containing SARS fragments hint at vulnerability. A French lab has lost more than 2,000 vials containing fragments of the deadly SARS virus, which killed nearly 800 people in a 2003 epidemic ...

A Merck vaccine research lab in the Philadelphia area was temporarily placed on lockdown Tuesday night after the discovery of "questionable" vials inside a freezer that were labeled "smallpox" and ...

Health authorities said that Federal investigators are probing how vials of smallpox made their way into a storage room at a Food and Drug Administration lab near the US capital. Health authorities ...