Infectious disease | Definition, Types, & Causes | Britannica
https://www.britannica.com/science/infectious-disease
Dec 2, 2023 · infectious disease, in medicine, a process caused by an agent, often a type of microorganism, that impairs a person’s health. In many cases, infectious disease can be spread from person to person, either directly (e.g., via skin contact) or indirectly (e.g., via contaminated food or water).Web
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