👉 Infection is a complex biological process characterized by the invasion and multiplication of pathogenic microorganisms, such as bacteria, viruses, fungi, or parasites, within a host organism. Key qualities of infection include its ability to breach the body's natural defenses, often through breaches in the skin or mucous membranes, and establish a foothold. Once inside, pathogens can replicate rapidly, leading to tissue damage and systemic effects. Infection is marked by symptoms like inflammation, fever, and immune response activation, which are the body's attempts to eliminate the invading agents. The severity of infection can vary widely, from mild and self-limiting to life-threatening, depending on factors such as the pathogen's virulence, the host's immune status, and environmental conditions. Effective treatment typically involves targeting the pathogen directly or supporting the body’s immune response to clear the infection.
