900 severe respiratory illness cases at Denver hospital , urgent care , says official . Will Cornejo , 13 , was among the children in intensive care at Rocky Mountain Hospital for Children after he came down with a cold last weekend and then woke up Tuesday night with an asthma attack that could n't be subsided with his medicine albuterol . Comment: `` This is the worst I 've seen in my time , '' a Colorado doctor says . Enterovirus D68 ( EV-D68 ) causes respiratory illnesses like a cold , only worse .
900 severe respiratory illness cases at Denver hospital , urgent care , says official . Comment: `` This is the worst I 've seen in my time , '' a Colorado doctor says . Enterovirus D68 ( EV-D68 ) causes respiratory illnesses like a cold , only worse .