👉 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 invasion often begins when these microorganisms breach the body's natural barriers, such as the skin or mucous membranes. Once inside, they can replicate and cause damage to host tissues, triggering an immune response. The immune system attempts to neutralize the pathogens through various mechanisms, including inflammation, phagocytosis by white blood cells, and the production of antibodies. However, if the infection is severe or the host's defenses are compromised, it can result in illness or disease. Understanding infection involves studying the pathogens themselves, their modes of transmission, and the body's defense mechanisms to develop effective prevention and treatment strategies.
