Alertness

Swatting chikungunya

Summer days may be waning, but health officials are still on high alert for new cases of chikungunya, a painful mosquito-borne virus that spread to the United States from the tropics earlier this year. ...

Sep 18, 2014
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Alertness is the state of paying close and continuous attention, being watchful and prompt to meet danger or emergency, or being quick to perceive and act. It is related to psychology as well as to physiology. A lack of alertness is a symptom of a number of conditions, including narcolepsy, attention deficit disorder, chronic fatigue syndrome, depression, Addison's disease, or sleep deprivation. The word is formed from "alert", which comes from the Italian "all'erta" (on the watch, literally, on the height; 1618)

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