👉 Infection is a biological process where a pathogen, such as a virus, bacterium, fungus, or parasite, enters and establishes itself within a host organism, leading to disease. The format of describing infection typically begins with defining the pathogen and its mode of entry—whether through inhalation, ingestion, direct contact, or vectors like mosquitoes. Once inside, the pathogen must evade or manipulate the host's immune system to replicate and spread. This can result in symptoms ranging from mild discomfort to severe illness, depending on the pathogen's virulence and the host's immune response. The infection can progress through various stages, including colonization, replication, and dissemination, ultimately causing tissue damage or systemic effects. Understanding the infection process is crucial for developing treatments and preventive measures, such as antibiotics, antivirals, vaccines, and hygiene practices.
