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

Answers (1)
M mansi

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.