Common RNA viruses are: (1) Flaviviridae: causes Break Bone Fever carried by mosquitoes and is often fatal, e.g. St. Louis encephalitis and Hepatitis C virus (HCV). (2) Picornavirus: e.g. Poliovirus causes Poliomyelitis includes Hepatitis A virus (HAV) and Rhinovirus causes common cold. (3) Retroviridae: includes HIV and Human T-cell leukemia virus 1 and 2. (4) Togaviruses is carried by mosquitoes and caused severe encephalitis. Rubella virus causes German measles. (5) Orthomytoviruses: e.g. influenza A, B, and C cause localized infections of the respiratory tract, A and B viruses cause inflammations of the nerves, B causes Reyes syndrome lethal to the liver and the brain. (6) Paramyxovirus: e.g. mumps and measles viruses that frequently infect infants and young adults. (7) Rhabdovirus: e.g. rabies by animal bites. In rare cases, a person can be infected by inhaling the virus. (Filoviridae: e.g. ebola virus causes African hemorrhagic fever.


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