diseases

diseases

by Tanishka Verma

​what's a disease?

​A disease is caused when a person feels week and sick.

​communicablediseases

​They are the disease caused by air, water and direct contact. communicable disease spread by some subtance called GERMS. The germs are of 4 types

​1 virus

​They cause diseases such as

​chicken pox, polio,common cold

​protozoa

They cause diseases such as malaria and amoebic dysentery

​BACTERIA

​THEY cause diseases such as typhoid,plague

​thankyou