👉 An infection is an invasion of the body by pathogenic microorganisms, such as bacteria, viruses, fungi, or parasites, which can cause disease. When these microbes enter the body through breaks in the skin, mucous membranes, or via ingestion and are not effectively eliminated, they establish themselves and multiply, leading to an infection. This process often involves the immune system's response, which attempts to fight off the invaders but can sometimes contribute to the symptoms of illness. Infections can range from mild, such as a common cold, to severe, like sepsis or pneumonia, depending on the type of pathogen and the individual's health status. Understanding infections is crucial for developing treatments and preventive measures to protect health.
