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….