Laboratory testing at the Centers for Disease Control and Prevention (CDC) showed Friday that recently discovered vials marked as “smallpox” contain vaccinia, the virus used in smallpox vaccine. There ...

PHILADELPHIA (AP) — Federal health authorities on Wednesday confirmed the discovery of some frozen vials labeled “Smallpox" in a freezer at a facility in Pennsylvania that conducts vaccine research.

A bottle of smallpox vaccine is held by a doctor at CDC headquarters in Atlanta in 2003. (Tami Chappell/Reuters) WASHINGTON — The FBI and the Centers for Disease Control and Prevention are ...

Frozen vials with “smallpox” labels found at a Pennsylvania lab contain the virus used in the vaccine for the virus and not the virus that causes the disease, public health officials said Thursday.

PHILADELPHIA — Federal health authorities on Wednesday confirmed the discovery of some frozen vials labeled “Smallpox” in a freezer at a facility in Pennsylvania that conducts vaccine research. The ...