Smallpox can be deadly even after it is freeze-dried, but the virus usually has to be kept cold to remain alive and dangerous. In an interview Tuesday, a CDC official said he believed the vials were ...

PHILADELPHIA (WABC) -- The US Centers for Disease Control and Prevention says several questionable vials found at a Merck facility in Montgomery County, Pennsylvania, did not contain variola virus, ...

Frozen vials labeled “Smallpox” that were discovered in a freezer at a vaccine research facility in Pennsylvania “contain no trace of virus known to cause smallpox,” federal health officials said. The ...

Days after a Pennsylvania lab was locked down because a worker discovered vials labeled “smallpox” in a freezer, the CDC says there’s no reason to fear a viral outbreak. Late Thursday night, federal ...

PHILADELPHIA, Pa. — Frozen vials labeled “smallpox” that were recently discovered at a Pennsylvania facility contained no trace of the virus that causes the eradicated disease, according to the ...

Add Yahoo as a preferred source to see more of our stories on Google. PHILADELPHIA (AP) — Federal health authorities on Wednesday confirmed the discovery of some frozen vials labeled “Smallpox" in a ...

— Smallpox was one of the most lethal diseases in history. For centuries, it killed about one-third of the people it infected, and left most survivors with facial scars from the lesions. — The last ...

ATLANTA – A government scientist cleaning out an old storage room at a research center near Washington made a startling discovery last week – decades-old vials of smallpox packed away and forgotten in ...