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Vials labeled 'smallpox' found at vaccine research facility in Pennsylvania, CDC says
By Maggie Fox
Top news
Vials found in Pennsylvania lab did not contain smallpox as labeled, CDC says
By Tim Stelloh
Vials of deadly virus accidentally discovered at Pennsylvania research facility while cleaning freezer: CDC
By Pilar Arias
Smallpox vials found at vaccine research center outside Philadelphia
By Rodrigo Torrejon
FBI launches probe after 'SMALLPOX is found in Merck facility while cleaning out a freezer'
By Adam Manno
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Philadelphia lab briefly locked down after worker finds ‘smallpox’ vials in freezer
By Alexandra Villarreal
‘Smallpox' Vials Found at Merck Lab in Suburban Philadelphia Facility
By Brian McCrone & Deanna Durante
C.D.C. Says 'Smallpox' Vials Found in Lab Did Not Contain Disease-Causing Virus (Published 2021)
By Johnny Diaz
FBI investigates 'smallpox' vials found in Pennsylvania lab
By Yasemin Saplakoglu