ViroStat, Portland, Me, has expanded its offering of hepatitis B reagents, including its Monotope and Omnitope antibodies and recombinant antigens. Hepatitis B is a liver illness caused by the hepatitis B virus. Although a vaccine has been available since 1982, it is estimated that one third of the world’s population has been infected during their lifetime. This infectious disease is still common today in China. Specificities include surface antigen (HBsAg), HB core, HB ³e², HB-X, pre-S1, and pre-S2. Applications for these reagents include ELISA, IHC, WB, and rapid tests. For more information, visit ViroStat.