... continue to shed the bacteria in their stool for up to 3 weeks. How to prevent spread of the illness to other children. Exclude child from school and child care until diarrhea has stopped. ... day before to 5 days after symptoms develop (up to 7 days after symptoms develop for young children) How to prevent spread of the illness to other children. Child may attend school or ... no longer pass it on to anyone else. How to prevent spread of the illness to other children. Child may go to school or child care if they are feeling well enough to take part in the...