👉 Infection refers to the process by which a pathogen, such as a virus, bacterium, or parasite, enters and takes control of a host's cells, leading to disease. This occurs when the pathogen breaches the body's natural barriers, like the skin or mucous membranes, and begins to replicate within the host's tissues. The infection can cause damage through direct cellular disruption, immune system activation, or by producing toxins that harm host cells. Depending on the type of pathogen and the affected area, infections can manifest in various ways, from mild symptoms like a cold to severe conditions such as pneumonia or sepsis. Effective treatment often involves targeting the pathogen directly or supporting the body's immune response to clear the infection.
