👉 Infection refers to the process by which a pathogen, such as a virus, bacterium, or parasite, enters and takes control of a host's body, leading to disease. This can occur through various routes, including respiratory droplets, contaminated food or water, vectors like mosquitoes, or direct contact. Once inside, the pathogen multiplies and disrupts normal cellular functions, triggering an immune response. However, if the infection is severe or the host's immune system is compromised, the pathogen can cause significant harm, leading to symptoms ranging from mild discomfort to life-threatening conditions. Understanding infection is crucial for developing effective treatments, vaccines, and public health strategies to prevent and control the spread of diseases in communities.
