Virus on recently purchased orchid?

[Sébastien Rivest]

Hi everyone,

I just received a Stanhopea I recently purchased and one of the two leaves (the oldest) have irregular yellow spots and circular patterns (see attached file). As far as I know, those patterns are characteristic of viral infection, but the seller told me that it is very unlikely since he don't grow other orchids.

So, I need your help to know what is responsible for those patterns. The seller assured me that a viral infection is very unlikely, but I don't want to take the risk of infecting my other orchids.

Thank you for your help!