Objective To investigate the incidence blood- borne occupational exposure among medical staff and analyze risk factors so as to put forward prevention countermeasures. Methods Occupational exposures that occurred in 515 medical staff from Jan 2009 to Dec 2015 were investigated,then the occupation,working life,exposure sources,exposure approaches,causes of exposures were analyzed. Results Among the 515 medical staff with occupational exposure,the nurses accounted for 67. 77%. Medical staff with the working l...