Common characteristics 40-70 nm in diameter, +SSRNA spherical enveloped Hemophilic arthropods as vector, and viruses replicate in arthropod o 5 type clinical manifestations and diseases related to season and districtCommon characteristics  40~70 nm in diameter, +ssRNA spherical enveloped  Hemophilic arthropods as vector, and viruses replicate in arthropod  5 type clinical manifestations and diseases related to season and district