Karen, the only hosta I've had issues with so far was one from Lowe's. I was just learning about HVX (and at least took care to keep them separated!) but was still sad to see it come up sick last spring.
Just isolate them and be careful to clean you hands if you use them to break off a flower or a leaf before you go on to any other hostas. They MAY be fine or they could be infected and not show signs for several years. If you are careful about how you handle them you should be able to grow them safely until you decide they are safe or see sign of infection.
OK. Because disease shows up different on different cultivars and I'm new to gardening and still not exactly sure about what each one is supposed to look like, I'm gonna have to keep watching till I get the hang of it. It's hard to tell now since they are just starting new growth so some of the older leaves are different looking.
The 2 I have with the virus showed signs of it pretty quick, though I wasn't sure it that's what it was. Last year I was sure and should have removed them then. Now they are a lot bigger. Will definitely remove them in the fall.