title: Variarterivirinae
text: # Variarterivirinae
  
  Variarterivirinae is a subfamily of enveloped, positive-strand RNA viruses which infect vertebrates. The subfamily is in the family Arteriviridae and order Nidovirales. The subfamily contains three genera.
  
  ## Structure
  
  Member viruses are enveloped, spherical, and 45–60 nm in diameter.
  
  ## Genome
  
  Variarteriviruses have a positive-sense single-stranded RNA genome.
  
  ## Taxonomy
  
  The subfamily Variarterivirinae contains three genera:
  
  * Betaarterivirus
  * Gammaarterivirus
  * Nuarterivirus
  