Changes

==Introduction==

===Introduction===

Arteriviruses are animal-specific '''endemic''' viruses that persist within a population.

Arteriviruses are animal-specific '''endemic''' viruses that persist within a population.

==Morphology==

===Morphology===

*Small, enveloped, positive sense RNA viruses

*Small, enveloped, positive sense RNA viruses

==Epidemiology==

===Epidemiology===

*'''Aerosol''' and '''venereal''' transfer

*'''Aerosol''' and '''venereal''' transfer

*Poor vaccination

*Poor vaccination

==Virus by Species==

===Virus by Species===

===[[Porcine Reproductive and Respiratory Syndrome (PRRS)]]===

 

[[Category:Viruses]]

[[Category:Viruses]]