👉 An infection is an invasion of the body by pathogenic microorganisms, such as bacteria, viruses, fungi, or parasites, which disrupt normal cellular functions and can lead to disease. When these invaders breach the body's defenses—such as the skin, mucous membranes, or internal barriers—they trigger an immune response. However, if the pathogen is highly virulent or the host's defenses are weakened, the infection can progress, causing symptoms ranging from mild discomfort to severe illness. Infections can be localized, affecting a specific area like a sore throat or a localized wound, or systemic, spreading throughout the body and potentially affecting multiple organs. Treatment typically involves antibiotics for bacterial infections, antiviral drugs for viruses, antifungal medications for fungal infections, or antiparasitic treatments, depending on the causative agent. Understanding and managing infections is crucial for preventing complications and promoting recovery.
