Cymbidium mosaic virus (CyMV)
CyMV causes yellowing of the leaves that forms a mosaic pattern followed by a blackening and death of that area of the leaf along the leaf margins. More specifically, CyMV has been shown to cause colour breaking in Cattleya flowers.
Sorry. The only hope regarding the V word is that this particular virus seems to only be transmitted by cutting tools, not contact. I guess if each plant had an open wound that came in contact that would count.