👉 Infection is an invasion by pathogenic microorganisms—such as bacteria, viruses, fungi, or parasites—into a host's body, leading to disease. When these microorganisms breach the body's natural defenses, like the skin or mucous membranes, they can multiply and cause harm. This process often triggers an immune response, which the body attempts to combat through inflammation and other defense mechanisms. However, if the infection persists or the immune system is overwhelmed, it can result in symptoms ranging from mild discomfort to severe illness, depending on the type of pathogen and the individual's overall health. Common infections include strep throat, pneumonia, and urinary tract infections, each affecting different parts of the body and requiring specific treatments to resolve. Understanding infection is crucial for prevention, early detection, and effective management to minimize its impact on health.
