Smallpox vaccination.
D000368:Aged; D006801:Humans; D007166:Immunosuppressive Agents; D007938:Leukemia / Q000150:complications*; D008228:Lymphoma, Non-Hodgkin / Q000150:complications; D008297:Male; D012900:Smallpox Vaccine / Q000009:adverse effects*
D007166:Immunosuppressive Agents; D012900:Smallpox Vaccine