👉 Infection is a process where a pathogen, such as a virus or bacteria, enters and takes over a living cell or tissue in the body, causing harm. This happens when the pathogen breaches the body's natural defenses, like the skin or mucous membranes, and begins to multiply. Once inside, the pathogen can disrupt normal cellular functions, leading to symptoms like fever, inflammation, or disease. Essentially, infection occurs when an invading microbe gains access to and starts reproducing within a host organism.
