[The World Health Organization's seminary in Madrid on viruses and Rickettsias].
D006801:Humans; D012281:Rickettsia; D012282:Rickettsia Infections; D012574:Schools; D014777:Virus Diseases; D014780:Viruses; D014944:World Health Organization
RICKETTSIAL DISEASES; VIRUS DISEASES
La Organización Mundial de la Salud celebra en Madrid un seminario de virus y ricketsias.