برسین به دادم خلاصه این بی لامصب چی میشه.

Microbs are very small things that live around you. you cant see them without microscope. Bacteria and Viruses are twe type of Microbs. They are diffrent in their living and jobs. sometimes Bacteria is useful and some time it is harmful. without useful Bacteria you cant live. all of the Viruses are harmful and they make you sick.