👉 Infection is a biological process where a pathogen, such as a virus, bacteria, or parasite, enters and takes control of a host's body, leading to disease. When a pathogen invades, it can invade cells, disrupt normal bodily functions, and trigger an immune response. The immune system fights back with white blood cells and antibodies to neutralize the pathogen, but if the infection is severe or the pathogen is particularly virulent, it can overwhelm the body's defenses, causing illness. Common symptoms include fever, inflammation, and tissue damage. Understanding infection involves recognizing how pathogens enter the body, the mechanisms of immune response, and the importance of preventive measures like vaccination and hygiene to reduce the risk of infection.
