The vaccinated world.
D003937:Diagnosis, Differential; D006801:Humans; D007114:Immunization; D008457:Measles / Q000175:diagnosis; D012899:Smallpox / Q000175:diagnosis / Q000453:epidemiology / Q000517:prevention & control*; D012900:Smallpox Vaccine; D014944:World Health Organization
D012900:Smallpox Vaccine