Answers

2015-05-13T16:14:02+05:30
infectious disease spread by many ways :-
   - by water , disease like cholera is spread 
   - by animals , disease like rabbis 
   - by air , disease like common cold , pneumonia , tuberculosis 
   - by sex like HIV , syphilis 
     * by mouth to mouth 
      * by breast on feeding milk 

 
 

 
        
  
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STD and the exchange of bodily fluids. In stars