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NCERT CLASS IX - Science Textbook

Chapter 13 - Why Do We Fall Ill

What are the different means by which infectious diseases are spread?


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
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