👉 Infection is a biological process where pathogens, such as bacteria, viruses, fungi, or parasites, invade and multiply within a host organism, leading to disease. When a pathogen enters the body through various routes—like the respiratory tract, skin, or digestive system—it can trigger an immune response. However, if the pathogen overwhelms the host's defenses, it can cause infection. This can result in symptoms ranging from mild irritation to severe illness, depending on the type of pathogen and the individual's health status. Effective prevention and treatment involve understanding how infections occur and implementing measures like hygiene, vaccination, and antibiotics to combat the invaders before they cause significant harm.
