Arboviruses Arboviruses spread by arthropod vectors such as mosquitoes, ticks, and flies It has four families: togaviruses, flaviviruses bunyaviruses and reoviruses The major arbovirus disease worldwide are yellow fever, dengue, Japanese B encephalitis, St Louis encephalitis, Russian spring-summer encephalitis Most illnesses caused by these viruses are mild fevers; some may cause severe encephalitis, and life-threatening hemorrhagic fever. Arboviruses spread by arthropod vectors, such as mosquitoes, ticks, and flies  It has four families: togaviruses, flaviviruses, bunyaviruses and reoviruses  The major arbovirus disease worldwide are yellow fever, dengue, Japanese B encephalitis, St. Louis encephalitis, Russian spring-summer encephalitis.  Most illnesses caused by these viruses are mild fevers; some may cause severe encephalitis, and life-threatening hemorrhagic fever. Arboviruses