👉 Infection is a biological process where pathogens, such as bacteria, viruses, fungi, or parasites, invade a host organism and multiply, often causing disease. This interaction begins when pathogens enter the body through various routes like ingestion, inhalation, or direct contact. Once inside, they can adhere to or invade host cells, evade the immune system, and exploit cellular machinery for replication. The host's immune response, including inflammation and the activation of immune cells, aims to contain and eliminate the pathogens. However, if the infection is severe or the host's defenses are compromised, it can lead to illness or disease. 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.
