Is this a virus on my paphiopedilum?

[Dani8]

I am bringing my orchids back indoors and I just noticed this on the older leaves of my paphiopedilum hybrid.
Is this a virus, a fungus or nothing to worry about?
Picture attached.

[estación seca]

I don't know. The only way to know is to test.

I have read slipper orchids rarely show signs of virus other than lack of vigor.

Some fungi can cause rings like this.

If there is an orchid society near you they may have seen something like this in outdoor orchids.