The spectre of smallpox.
Mortimer
P P
PP
D016358:Contact Tracing; D006801:Humans; D017589:Immunization Programs; D012899:Smallpox / Q000175:diagnosis / Q000453:epidemiology* / Q000517:prevention & control*; D012900:Smallpox Vaccine / Q000008:administration & dosage; D006113:United Kingdom / Q000453:epidemiology
D012900:Smallpox Vaccine