👉 Infection is a biological process where pathogens, such as bacteria, viruses, fungi, or parasites, invade and colonize a host organism, leading to disease. When a pathogen enters the body, it can trigger an immune response, but if the pathogen overcomes the host's defenses, it can cause infection. This occurs when the invading microorganism adheres to and penetrates host tissues, multiplying and spreading. The body's immune system then attempts to combat the infection through inflammation, fever, and the production of antibodies and white blood cells. However, if the infection is severe or the immune response is ineffective, it can result in illness, ranging from mild symptoms to life-threatening conditions. Understanding the mechanisms of infection is crucial for developing treatments and preventive measures, such as vaccines and antibiotics, to protect against and manage infectious diseases.
