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Q. 2.     What are the different means by which infectious diseases are spread?

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The  infectious diseases are spread through following means :

(i) Water : Disease like cholera are spread through contaminated water.

(ii) Air : Common cold ,pneumnia are spread through sneezing ,coughing through air.

(iii) Sexual contact: AIDS or syphilis are transmitted through sexual contact.

(iv) Animals : Some diseases like malaria,dengue are spread through mosquitos.


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