Answers

2015-05-14T15:25:13+05:30
patient gets  disease by many ways :-
   - if they were not taking good food then they get sick and disease like food poisoning and other stomach diseases 
   - if they are not taken proper vaccines like polio , hepatitis , etc. 
   - they are not proper sanitized 
   - they are not drinking clean water 
thats why the infectious agent attacks on that body and causes different types of diseases .
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