The lead growth does look fine, as others have mentioned.
The older leaf
does not show signs of viral infection. I highly doubt there is any fear from a viral infection on your orchid at all.
Should you still have any doubts whatsoever about our opinions regarding the unlikelihood of your orchid having had contracted a viral infection being valid, there are orchid viral test kits available to hobbyists that you may order online.
Here's the link:
Agdia, Inc. - The World Leader In Plant Pathogen Test Kits.
Whatever form of neglect the plant endured was what had caused the leaf discoloration on the older leaf, as was mentioned. Once that damage is done, it's done, it will not go away.
Do you happen to have a photo of the entire plant or a name tag in the pot?
Right now I'm guessing it's some sort of Cattleya or any number of their intergeneric hybrids
Placing a name to the plant may get you better care instructions.