If the food of the canteen is unhygienic first of all ,all the students should warn the canteen head to maintain hygiene and if after warning him or her if he or she does not maintain hygiene all the students together have to complain the principle of your school and and ask the principle to appoint another canteen head and maintain the hygiene of the canteen as well as the school.
 diseases are cholera,dengue,malaria,typhoid,diarrhea etc. 
          ASL is not so hard i have given it yesterday. 
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