“…Of the total of 43 sick persons, 24 carried the virus and five others had serological evidence of infection. The number of proved infections was thus 29-a rate of 67.4%, only slightly lower than the rates of 70 and 84% respectively recorded by Galpine, Clayton, Ardley, and Baster (1958) in Coventry, and by Sabin, Krumbiegel, and Wigand (1958) in Milwaukee. The latter workers also reported the isolation of virus during the week prior to onset of illness.…”