Letter: "Wild white" viruses and smallpox.
D000818:Animals; D001431:Bacteriological Techniques; D015023:Democratic Republic of the Congo; D004196:Disease Outbreaks / Q000453:epidemiology; D004197:Disease Reservoirs; D000882:Haplorhini; D006801:Humans; D008131:London; D002679:Pan troglodytes; D011212:Poxviridae / Q000302:isolation & purification* / Q000472:pathogenicity; D011213:Poxviridae Infections / Q000635:transmission*; D012899:Smallpox / Q000635:transmission*; D012901:Variola virus / Q000302:isolation & purification* / Q000472:pathogenicity