NEW : U.S. official to NIH : The situation is a `` screw-up '' U.S. mayor : The patient came into contact with half people . `` You do n't want to pile on them , but hopefully this will never happen again . ... Hospital says symptoms 'did not warrant admission ' September 20 . CNN official on hospital : ` ` They dropped the ball ''
NEW : U.S. official to NIH : The situation is a `` screw-up '' U.S. mayor : The patient came into contact with half people . Hospital says symptoms 'did not warrant admission ' September 20 . CNN official on hospital : `` They dropped the ball ''