Huge shout-out to Michael and Triton Orchids

[Roberta]

It is not practical or economically possible for any vendor to test every plant. And I don't think anybody would guarantee "virus-free". Test your plants depending on level of concern. The occasional positive plant is going to happen. Also a lot depends on how they respond when a virused plant is called to their attention. if a vendor has a high number of these you would want to buy elsewhere. But perfection is likely not attainable, especially when price is also a consideration.