Kaposi's sarcoma and hepatitis B vaccine.
D006515:Hepatitis B virus / Q000276:immunology*; D006716:Homosexuality; D006801:Humans; D008297:Male; D012514:Sarcoma, Kaposi / Q000209:etiology*; D014765:Viral Vaccines / Q000009:adverse effects*
D014765:Viral Vaccines