👉 Infection is a biological process where pathogens, such as bacteria, viruses, fungi, or parasites, invade and multiply within a host organism, leading to disease. This occurs when these microorganisms breach the body's natural barriers, like the skin or mucous membranes, and establish themselves in tissues or organs. The immune system responds by attempting to eliminate the invaders through various mechanisms, including inflammation and the production of antibodies. However, if the infection is severe or the host's defenses are compromised, the pathogens can cause damage, leading to symptoms ranging from mild discomfort to life-threatening conditions. Understanding infection is crucial for developing effective treatments and preventive measures, such as vaccines and antibiotics, to protect against and manage infectious diseases.
