Presentation of the 1982 Henry Baldwin Ward Medal.
D000818:Animals; D000941:Antigens / Q000276:immunology; D001363:Awards and Prizes; D005209:Fasciola / Q000276:immunology; D049673:History, 20th Century; D010274:Parasitology / Q000266:history; D011647:Puerto Rico; D012547:Schistosoma / Q000276:immunology
D000941:Antigens