Philadelphia lab briefly locked down after worker finds ‘smallpox’ vials in freezer

The Pennsylvania Merck facility, which does vaccine research, is no longer on lockdown. Photograph: Andrew Kelly/Reuters

The Pennsylvania Merck facility, which does vaccine research, is no longer on lockdown. Photograph: Andrew Kelly/Reuters

source https://www.theguardian.com/society/2021/nov/18/philadelphia-lab-smallpox-vials-freezer