California , Hawaii and Mississippi are the only states without widespread cases . Flu activity is `` elevated '' in most of the United States , he said , and `` it may be decreasing in some areas , but that 's hard to predict ... Other respiratory illnesses are also common , experts say . Officials do n't know whether flu cases have peaked this year . The number of flu - related deaths for children climbed by half to a high of 20 , officials say .
California , Hawaii and Mississippi are the only states without widespread cases . Other respiratory illnesses are also common , experts say . Officials do n't know whether flu cases have peaked this year . The number of flu - related deaths for children climbed by half to a high of 20 , officials say .