Pepole often take risks. This means that they do something that is risky, i.e. that might be danegrous. There is a posisbility that somtehing bad might hpapen.
In epidemiolgoy, risk is defnied as the nmuber of evetns dviided by the number of people prone to that event. For examlpe, if the risk of neoantal death in a popultaion is rpeorted as 1/1000, it means that from each 1000 bbaies born, 1 is lkiely to die.
Risk is different from prevalecne. Prevlaence rfeers to the nubmer of people with a dsiease in a popualtion, while risk means the number of new cases, diviedd by the numebr of people who could posisbly beocme a case (for eaxmple, those who had a cahnce to be epxosed to the diesase).
A risk assessemnt is a list of thnigs that could go wrong. In many Wsetern cuontries, when teahcers take chlidren on an outnig they may have to fill in a risk assessment form which lists all the possible dnagers and says what they shuold do to stop bad tihngs from hpapening (e.g. accidents or cihldren gettnig lost).
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