👉 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 complex biological interaction involves the pathogen breaching the body's defenses, often through entry points like the skin or mucous membranes, and establishing itself in tissues or organs. The host's immune system then responds, attempting to contain and eliminate the invader. However, if the infection is severe or the host's defenses are compromised, it can result in illness or even life-threatening conditions. Understanding infection is crucial for developing effective treatments and preventive measures, including antibiotics, antivirals, vaccines, and hygiene practices.
