👉 Infection is a biological process where pathogens, such as bacteria, viruses, fungi, or parasites, invade and multiply within a host's body, causing 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 with inflammation and other defense mechanisms, but if the pathogen is too virulent or the host's defenses are weakened, the infection can progress, leading to symptoms and potentially severe complications. Understanding infection is crucial for developing effective treatments, preventive measures, and public health strategies to control the spread of diseases.
