👉 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 initially responds by attempting to eliminate the invaders through inflammation and other defense mechanisms. However, if the pathogen is resilient or the infection is severe, it can cause damage to host cells and tissues, resulting in symptoms ranging from mild discomfort to life-threatening conditions. Understanding infection is crucial for developing effective treatments and preventive measures, such as antibiotics, antivirals, and vaccines, which target specific pathogens or boost the immune system's ability to fight off infections.
