Immune System Complete Guide: This Is How Your Body Keeps Out Bacteria and Viruses (Infographics)

How does the body's immune system fight viruses and bacteria? What factors affect immunity? The complete guide to the mysteries of the immune system. The Epoch Times

There is an increasing number of infectious diseases circulating around the world, from influenza to SARS to COVID-19. Your immune system plays a key role in fighting off these infectious diseases. So how does the immune system work to fight viruses and bacteria? What factors affect your immunity? This article will answer all your questions with diagrams.

The human immune system is quite sophisticated, with various immune cells involved. Their role in the body is like that of an army, resisting the invasion of foreign pathogens and defending the body’s health. Pathogens refer to agents that can cause various diseases after entering the body, including viruses, bacteria, molds, parasites, etc.

The First Immune Barrier: The Skin and Nose Keep Viruses Out

The immune system’s first barrier includes skin, nose hair, tears, etc. These are excellent physical barriers that can keep pathogens out of the body. If the body is a country, then the first barrier could be considered its “defensive wall.”