well there are many health effects you can talk about... vomiting, diarrhea, various other forms of sickness often prokaryotes or bacteria will cause the contamination... this is
normally taken care of in places that have a water treatment facility to
filter out all that nasty stuff they can spread in various ways from one person to the next but one of
the most common is the fecal-oral route, meaning that the disease can be
spread is someone ingests something that has somehow come into contact
with the feces of a person who has the disease
