What Are the Four Natural Body Defenses Against Infection?

Natural barriers include the skin, mucous membranes, tears, earwax, mucus, and stomach acid.

What is the body's natural defense against infection?

The immune system is the body's defense against infections. The immune (ih-MYOON) system attacks germs and helps keep us healthy.

What are the 3 defenses your body has against Infectious Disease?

The human body has three primary lines of defense to fight against foreign invaders, including viruses, bacteria, and fungi. The immune system's three lines of defense include physical and chemical barriers, non-specific innate responses, and specific adaptive responses.