Simplify the following text for a Grade 17 native English-speaking person.
Original: Orthopox : variola virus , vaccinia virus , cowpox virus , monkeypox virus , smallpox ( eradicated ) ; Parapox : orf virus , pseudocowpox , bovine papular stomatitis virus ; Yatapox : tanapox virus , yaba monkey tumor virus ; Molluscipox : molluscum contagiosum virus ( MCV ) .
Simplified: Orthopox : smallpox virus ( variola ) , vaccinia virus , cowpox virus , monkeypox virus ; Parapox : orf virus , pseudocowpox , bovine papular stomatitis virus ; Yatapox : tanapox virus , yaba monkey tumor virus ; Molluscipox : molluscum contagiosum virus ( MCV ) .