👉 Infection refers to the process by which pathogens, such as bacteria, viruses, fungi, or parasites, invade and multiply within a host organism, leading to disease. This occurs when these microorganisms breach the body's natural barriers—like the skin or mucous membranes—and establish themselves in tissues or organs. Infection can result in a wide range of symptoms and health issues, from mild discomfort to severe illness or even death, depending on the pathogen and the host's immune response. The body's immune system plays a crucial role in fighting off infections, but pathogens have evolved various strategies to evade or suppress these defenses, making some infections particularly challenging to treat. Understanding infection is vital for developing effective prevention methods, such as vaccines and antibiotics, and for managing diseases that affect human health globally.
