ViroStat, Portland, Maine, has released a set of new monoclonal antibodies to the NS1 protein of Zika virus. The new antibodies do not crossreact with related flaviviruses tested, nor with chikungunya virus. They function in immunofluorescence assays and pair in enzyme-linked immunosorbent assays. Zika virus is a mosquito-borne flavivirus, usually marked by a mild, self-limiting infection of short duration that results in fever and a rash. The symptoms are similar to those caused by the Dengue and chikungunya viruses. However, recent cases of Zika infection among pregnant patients have resulted in fetal neurological complications with resulting birth defects. There is also evidence that the virus can be transmitted sexually. For more information, visit ViroStat.