THE EPIDEMIOLOGY OF THE ORIGIN AND PERPETUATION OF A NEW DISEASE.
D000818:Animals; D004813:Epidemiology; D006193:Haemophilus influenzae; D006664:History; D049673:History, 20th Century; D006801:Humans; D007251:Influenza, Human; D008511:Medicine; D009349:Nematode Infections; D009975:Orthomyxoviridae; D012106:Research; D013552:Swine; D013553:Swine Diseases; D014481:United States
EPIDEMIOLOGY; EXPERIMENTAL LAB STUDY; HAEMOPHILUS INFLUENZAE; HISTORY; HISTORY OF MEDICINE, 20TH CENT.; INFLUENZA; INFLUENZA VIRUSES; NEMATODE INFECTIONS; SWINE DISEASES; UNITED STATES