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Philadelphia lab briefly locked down after worker finds 'smallpox' vials in freezer
By Alexandra Villarreal
Top news
Vials labeled 'smallpox' found by lab worker cleaning freezer in Pennsylvania
By Elisha Fieldstadt
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
C.D.C. Says 'Smallpox' Vials Found in Lab Did Not Contain Disease-Causing Virus (Published 2021)
By Johnny Diaz
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‘Smallpox' Vials Found at Merck Lab in Suburban Philadelphia Facility
By Brian McCrone & Deanna Durante
FBI investigates 'smallpox' vials found in Pennsylvania lab
By Yasemin Saplakoglu