at a time when outbreaks and sporadic cases of influenza caused a a/victoria/3/75-like and a/texas/1/77-like h3n2 strain of influenza were occurring in the rocky mountain region of the usa , about 60 % of the students of a high school in cheyenne , wyoming , were involved in an outbreak of influenza-like illness .
C0039711
texas
C0041703
usa