👉 Infection is a biological process where a pathogen, such as a bacterium, virus, fungus, or parasite, invades and establishes itself within a host organism, leading to disease. This occurs when the pathogen breaches the body's natural barriers, like the skin or mucous membranes, and begins to multiply or cause damage. The immune system then responds by attempting to eliminate the invader, but if the pathogen is too virulent or the host's defenses are weakened, infection can take hold, resulting in symptoms and potential complications. Understanding infection is crucial for developing treatments and preventive measures to protect health.
