Second attacks of paralytic poliomyelitis in human beings in relation to immunity, virus types and virulence, with a report of two cases, and four other individuals in Baltimore, 1944, infected with virus of the Leon type.
D000818:Animals; D015142:Baltimore; D001522:Behavior, Animal; D006801:Humans; D007109:Immunity; D011051:Poliomyelitis; D012919:Social Behavior; D014774:Virulence
POLIOMYELITIS/immunity