Abstract
Health care personnel are required to be immune against vaccine-preventable diseases, such as measles, mumps, rubella, and varicella. The aim of this study is to evaluate the accuracy of self-reported histories of disease and vaccination against measles, mumps, rubella, and varicella in order to determine the immune status of health care personnel. A self-reported questionnaire of history of previous disease and vaccination against these diseases was administered to a total of 910 health care personnel in Shimane university hospital in Japan, whose results were compared with serological evidences. There were numerous subjects who did not remember a history of disease (greater than 33% each) and of vaccination (greater than 58% each). Self-reported history of disease and vaccination had high positive predictive value against either disease for testing positive for antiviral antibodies. However, a considerable number of false-negative subjects could be found; 88.9% of subjects for measles, 89.3% for mumps, 62.2% for rubella and 96.3% for varicella in the population who had neither a self-reported history of disease nor a vaccination against each disease. In addition, regardless of the disease in question, a negative predictive value in self-reported history of disease and vaccination was remarkably low. These results suggest that self-reported history of disease and vaccination was not predictive to determine the accurate immune status of health care personnel against measles, mumps, rubella, and varicella. A seroprevalence survey, followed by an adequate immunization program for susceptible subjects, is crucial to prevent and control infection in hospital settings.
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