Hi everyone,
About 2 months ago I purchased a Paph. gardinerii. The buds opened and a new fan continues to grow. So far so good but....

today I found the bottom leaf of the old fan had turned red half way up the leaf. I bought the plant with obvious cell collapse on other leafs but I now notice that these same areas also have a red tinge. This mark grew very fast, hence why I am thinking a virus. What do you think? Hopefully the picture is attached.
Thankyou
Linda