Countless viruses, bacteria, and other microscopic germs are scattered around us every day. Various germs can enter our body while breathing, eating, going outside, or coming into contact with other people. But we do not fall ill every time we come into contact with germs. The sole reason for this is that the immune system, or the body’s defense mechanism, is on 24-hour vigilant guard inside our body. It helps identify harmful pathogens entering the body, build a response against them, and fight against infections. This system includes the skin, mucous membranes, white blood cells, antibodies, and various types of…