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The epidemiological monitoring of injuries due to exposure to potentially infected biological liquids constitutes the indispensable premise for the elaboration of strategies meant to intervene to reduce the incidence. This work shows the results of an epidemiological study relative to the period going from January 1, 1994--December 31, 1998 elaborated by the use of the register of injuries deposited with the Sanitary Direction. The variables shown here allowed us to individualize the prevalence of injuries in the various professional categories, the working zones, the type and form of injury, the use of individual protection devices. The analyses of the data has shown a scarce sense of risk by the sanitary workers and a scarce application of protective measures. It's evident of the need to intervene in the formation of the workers to sensibilize then to the importance of preventive measures.