👉 Infection refers to the process by which a pathogen, such as a virus, bacterium, or parasite, enters and begins to multiply within a host organism, leading to disease. This can occur through various routes, including respiratory droplets, contaminated food or water, sexual contact, or direct physical contact. The immune system initially responds to the invader with inflammation and other defense mechanisms, but if the pathogen is virulent or the host's defenses are weakened, the infection can progress, causing symptoms ranging from mild irritation to severe illness or even death. Understanding the specific pathogens involved and their modes of transmission is crucial for developing effective treatments and preventive measures, such as vaccines and antibiotics.
