Nurses at risk.
D006801:Humans; D016602:Needlestick Injuries / Q000453:epidemiology* / Q000517:prevention & control*; D009741:Nursing Staff, Hospital; D016273:Occupational Exposure / Q000517:prevention & control* / Q000706:statistics & numerical data*; D016272:Occupational Health; D011159:Population Surveillance; D012307:Risk Factors; D014481:United States / Q000453:epidemiology