1.

How are infectious or contagious diseases spread?

Answer»

1. By Air : By air, germs of many diseases as small pox, measles, whooping cough, mumps, T.B. etc are carried from one place to another. 

2. By Water and Food : Cholera, Dysentry, Typhoid, Polio, T.B, (Tuberculosis) etc. are spread by impure water and poisonous food. 

3. By Insects : Malaria, Plague, Dengue etc spread through insects. 

4. By Direct Contact : Some diseases spread by direct contact with the infected persons and the things and articles used by him. 

5. By Skin Infection : Skin, no doubt, is a protective cover of our body but sometimes the germs make forced entry into the body through skin and continue multiplying, e.g., Tetanus and Anthrax. 

6. By Carriers : Some persons are the carriers of diseases like Typhoid, Diptheria, Cholera, Blood Dysentry etc.



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