| update: influenza activity--united states, 1991-92 season. | from october 23, 1991, through january 18, 1992, 46 state health departments reported regional or widespread influenza activity for 1 or more weeks. for the week ending january 4, 34 states reported regional or widespread activity, the most during any single week this season. from late october through mid-december, influenza outbreaks reported from 11 states involved primarily school children. reports of outbreaks among adults began in mid-november and continued through january and involved pers ... | 1992 | 1731184 |