👉 Infection refers to the process by which a pathogen, such as a virus or bacterium, invades and takes control of a host's cells or tissues, leading to illness. This occurs when the pathogen breaches the body's defenses, often through wounds, mucous membranes, or by entering via respiratory or digestive tracts. Once inside, the pathogen replicates, causing damage and triggering an immune response. However, if the infection is severe or the host's defenses are weakened, it can result in symptoms ranging from mild discomfort to life-threatening conditions. Understanding infection is crucial for developing effective treatments and preventive measures, such as vaccines and antibiotics, to combat diseases and protect public health.
