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 ...

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 ...

"There is no indication that anyone has been exposed." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Update: Lab testing by the Centers for ...

Vials labeled with "smallpox" were found at a Merck facility in Montgomery County, Pennsylvania, where vaccine research is conducted, but it is unclear why the vials were there, according to the ...