... A Guide for School Administrators, Nurses, Teachers, Child Care Providers, and Parents or Guardians Department of Health and Senior Services Bureau of Communicable Disease Control and Prevention ... Prevention and Control of Communicable Diseases A Guide for School Administrators, Nurses, Teachers, Child Care Providers, and Parents or Guardians Editors: Barbara Wolkoff ... have been asymptomatic for more than 7 calendar days. In the absence of laboratory verification, the excluded food handler may return to work after symptoms of vomiting and/ or diarrhea have...