Vials labeled “smallpox” were found in a Merck & Co. vaccine research facility in Montgomery County, Pennsylvania, near Philadelphia, the Centers for Disease Control and Prevention announced Tuesday.
After the vials were found, the Department of Homeland Security sent out an unclassified “For Official Use Only” alert.
According to the alert, 15 “questionable vials,” were found. Five vials were labeled as “smallpox,” and ten were labeled as “vaccinia.” As of Wednesday night, no announcement had been made detailing what the vials actually contained.
A lockdown was imposed when the vials were discovered, which has since been lifted.