PHILADELPHIA (WPVI) -- 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, the ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. A bottle of smallpox vaccine is held by a doctor at CDC headquarters in Atlanta in 2003. (Tami Chappell/Reuters) (Reuters ...

Two scientists working for a US government lab are facing charges connected to the smuggling of 113 virus vials into the ...

The Centers for Disease Control and Prevention is investigating the discovery of vials that are labeled “smallpox” at a laboratory in Pennsylvania, the health agency said Thursday. The frozen vials ...

Routine inventory check detected missing vial of virus at Galveston National Laboratory Guanarito virus is carried by rodents in Venezuela but people can be infected ...