An '''illness''' is a [[medicine|medical]] problem that detracts from the good [[health]] of an individual. The most common kind of illness is a physical illness--a problem with the body, caused by any number of factors such as infection, or poisoning. Illness can also be psychological.
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An '''illness''' is a [[medicine|medical]] problem that detracts from the good [[health]] of an individual. The most common kind of illness is a physical illness—a problem with the body, caused by any number of factors such as infection, or poisoning. Illness can also be psychological.