title: Serendipity in science-discovery of the B-1 strain of Newcastle Disease virus.
mesh_terms: D000818:Animals; D002645:Chickens; D006385:Hemagglutination Inhibition Tests; D049673:History, 20th Century; D009521:Newcastle Disease / Q000266:history / Q000276:immunology / Q000517:prevention & control; D009522:Newcastle disease virus / Q000276:immunology; D014481:United States; D014765:Viral Vaccines / Q000266:history
chemical_list: D014765:Viral Vaccines