👉 Infection is a biological process where pathogens, such as bacteria, viruses, fungi, or parasites, invade and multiply within a host organism, leading to disease. This invasion can occur through various routes, including respiratory droplets, contaminated food or water, or direct contact with infected surfaces. Once inside the body, pathogens evade or overcome the host's immune defenses, multiplying and causing damage to tissues and organs. The body's response to infection involves both innate and adaptive immunity, aiming to eliminate the pathogens and restore health. However, if the infection persists or overwhelms the immune system, it can result in illness, ranging from mild symptoms to severe, life-threatening conditions. Understanding the mechanisms of infection is crucial for developing effective prevention strategies, treatments, and vaccines.
