👉 Infection is a biological process where pathogens, such as bacteria, viruses, fungi, or parasites, invade and multiply within a host organism, disrupting normal cellular functions and causing disease. This occurs when these microorganisms breach the body's defenses, often through breaches in physical barriers like the skin or mucous membranes. Once inside, pathogens can replicate, leading to tissue damage, inflammation, and symptoms that range from mild discomfort to severe illness. The immune system responds by mounting an attack, but if the infection is overwhelming or the host's defenses are compromised, the pathogen can establish itself, leading to infection. Effective treatment typically involves targeting the pathogen directly or supporting the body's natural defenses to clear the infection and restore health.
