If there is fecal contamination of water, then the potential...
If there is fecal contamination of water, then the potential is there for viral causes of diarrheal illness -- like norovirus, like hepatitis -- if people had it before,
If there is fecal contamination of water, then the potential is there for viral causes of diarrheal illness -- like norovirus, like hepatitis -- if people had it before,