Random FactsCuriousOneMay 31, 2015fact, facts, known, live, russia, smallpox, States, staycurious, Two, united, US, usa, VirusComment Only two vials of live Smallpox virus known to remain, one in US, and one in Russia Random FactsCuriousOneMay 31, 2015fact, facts, known, live, russia, smallpox, States, staycurious, Two, united, US, usa, VirusComment
