caviid betaherpesvirus 2 caviid betaherpesvirus 2 caviid betaherpesvirus 2 (cahv-2) is a species of virus in the genus quwivirus, in the subfamily betaherpesvirinae, family herpesviridae, and order herpesvirales. caviid betaherpesvirus 2 virus classification (unranked): virus realm: duplodnaviria kingdom: heunggongvirae phylum: peploviricota class: herviviricetes order: herpesvirales family: herpesviridae genus: quwivirus species: caviid betaherpesvirus 2