ViroStat Inc, Portland, Maine, has released a set of monoclonal antibodies to human papillomavirus (HPV) L1 capsid proteins. Several are specific to type 16 and type 18, and others are pan-specific, reacting with all types tested. All function in enzyme-linked immunosorbent assays, with some usable in immunohistochemistry assays and others in western blot immunoassays. DNA viruses that infect human epithelial cells, HPV consists of several types, some of which cause common skin warts while others are known to increase cancer risk. Sexually transmitted HPV can cause genital warts and cervical cancer. Several vaccines are based upon the L1 major virus capsid proteins of the high-risk HPV types. For more information, visit ViroStat.