New Dendrobium virused?

[NeoOrchid]

Went to the local orchid greenhouse and purchased a lovely new Dendrobium Burana White. At least I thought it was lovely...the longer I've had it home I've been really examining it leaf by leaf and am concerned about a particular leaf that may be virused.

While going through an older book of mine "Home Orchid Growing by Rebecca Northern I came upon a black and white picture of a cattleya leaf afflicted by odontoglossum ring virus. And it looks like the leaf on this new orchid!

I'm worried. It's possible the leaf is just aging but I can't be sure. I'd really appreciate everyone's opinions and input.

The plant is at least 18 inches tall, has 5 canes with a large spike of 8 buds.

The pictures are taken to show the color changes and how blotchy the leaves look close up. In the greenhouse it was difficult to see the gradations in color. I really want this plant to be well!

Cheers!
Neo