👉 Infection refers to the process by which a pathogen, such as bacteria, viruses, fungi, or parasites, enters and begins to multiply within a host organism, typically causing disease. This occurs when the pathogen breaches the body's natural barriers, like the skin or mucous membranes, and establishes itself in tissues or organs. The immune system then responds, often leading to inflammation and symptoms as it fights off the invader. However, if the infection is severe or the host's defenses are weakened, it can result in serious health complications or even death. Understanding infection is crucial for developing treatments and preventive measures, such as antibiotics, vaccines, and hygiene practices.
