👉 Infection occurs when a pathogen, such as bacteria, viruses, fungi, or parasites, enters the body and begins to multiply or cause harm to host tissues. This process starts when the pathogen breaches the body's natural barriers, like the skin or mucous membranes, and then adheres to or invades host cells. The pathogen then replicates, often triggering an immune response as the body attempts to eliminate it. However, if the infection is severe or the immune system is compromised, the pathogen can cause disease by disrupting normal bodily functions, leading to symptoms ranging from mild discomfort to life-threatening conditions. Understanding the ground of infection is crucial for developing effective treatments and preventive measures, such as antibiotics, antivirals, and vaccines, which target specific pathogens or boost the immune system's ability to fight off infections.
