How does the immune system work when a pathogen enters the body?

Infection occurs when viruses, bacteria, or other microbes enter your body and begin to multiply. ... In response to infection, your immune system springs into action. White blood cells, antibodies, and other mechanisms go to work to rid your body of the foreign invader.

Explanation:The main job of the innate immune system is to fight harmful substances and germs that enter the body, for instance through the skin or digestive system. The adaptive (specific) immune system makes antibodies and uses them to specifically fight certain germs that the body has previously come into contact with.

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