👉 Infection is a biological process where pathogens, such as bacteria, viruses, fungi, or parasites, enter and multiply within a host organism, leading to disease. These pathogens can invade through various routes, including respiratory droplets, contaminated food or water, or direct contact with infected surfaces or bodily fluids. Once inside the host, the pathogen disrupts normal cellular functions, triggering an immune response aimed at eliminating the invader. However, if the infection is severe or the host's defenses are compromised, the pathogens can cause damage to tissues and organs, resulting in symptoms ranging from mild discomfort to life-threatening conditions. Understanding the mechanisms of infection is crucial for developing effective treatments and preventive measures, such as vaccines and antibiotics, to control and mitigate the spread of infectious diseases.
