👉 Infection is a biological process where a pathogen, such as a bacterium, virus, fungus, or parasite, enters 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 typically responds by attempting to eliminate the invader through various defense mechanisms, but if the pathogen persists or overwhelms the host's defenses, it can result in infection. Infection can manifest in different forms, from mild conditions like a cold to severe illnesses such as pneumonia or sepsis, depending on the type of pathogen and the host's overall health. Proper infection control measures, including hygiene practices and medical interventions, are crucial to prevent the spread of pathogens and protect against infection.
