The accuracy of laboratory tests for virus antigens and antibodies is critical. Recently, studies have shown that the clinical sensitivities and specificities of the tests for HBs antigens and HCV antibodies are very different among the commercial kits. Re-evaluation of these kits has started, but similar problems are also observed in tests for other viruses. This year, we focused on rubella, since the number of women negative for serum antibodies against rubella virus may increase in pregnant women in the future, and so the incidence of congenital rubella syndrome may increase. Furthermore, we examined the influenza virus, since new rapid diagnostic kits and specific drugs have been developed.

*1Fukushima Medical University, Fukushima 960-1247
*2Osaka University School of Allied Health Science, Osaka 565-0871