Ra
Viruses → ds DNA non-encapsulated viruses → Iridoviridae , Raphidovirus:
Re
, Reoviridae , Respirovirus: , Retroviridae
Rh
, Rhabdoviridae , Rhadinovirus: , Rhizidiovirus: , Rhopapillomavirus:
Ro
, Roniviridae , Rosavirus: , Roseolovirus: , Rotavirus:
Ru
, Rubivirus: , Rubulavirus: , Rudiviridae , Rudivirus:
Ry
, Rymovirus: