pathogen
A disease causing agent
A pathogen is any biological agent, such as a virus, bacterium, fungus, or parasite, that causes disease in its host. Pathogens invade the body through various means, such as inhalation, ingestion, or physical contact, and can cause anything from mild, self-limiting illnesses to severe, life-threatening diseases. Examples of pathogens include the influenza virus, E. coli bacteria, and Plasmodium parasites that cause malaria. Understanding how pathogens infect and interact with their host is a crucial aspect of medical research and public health, as it helps to develop strategies for preventing and treating infectious diseases.
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