【Abstract】 An indirect ELISA by using monoclonal antibody (McAb) against hutnan IgM (μ chain)as the antibody labeled with horseradish peroxidase (second antibody) is used in detecion Rubela virus - specific IgM for early diagnosis of Rubella virus infection. Through the detection and verifition of a large number of sera from normal population, the population closely contacted with Rubella virus and IgM - positive sera samples of Measles virus, cycoegaforirm and Toxplasma Gondii, it is indicated that this method is specific, seusiuive, simple, rapid and no cross - reaction with the positive sera of the pathogens menticned above, It can be used for early diagnosis of Rubella virus infection and epidemiological survey.更多还原