Not a virus. More likely are broad mites.

Looks like cyclamen mite to me.

I believe that I had both Broad Mite and Cyclamen Mite last year.

Plants like this one I was able to save by using a Neem-based product called Azamax, available on Amazon (for around $25.00).

The key is to get spray into all of the niches and crevices of the plant (all over the foliage, especially underneath), ... which is why some plants (especially tight or large) ... may be impossible to save.

When I concluded that I had Broad/Cyclamen Mites last year, I had 175 plants. I, sorted through my plants and discarded 100 (the worst affected).

I had another 65 plants that looked to be unaffected, and 10 plants which were mildly affected that I tried to save with Azamax.

To my surprise, I was able to save the plants I treated with Azamax (sprayed occasionally as needed). I replaced a number of the plants that I had to discard, ... and I now have a healthy collection again.

I isolated the few plants that I was treating and only moved them back into the collection when there was no more evidence of Mites for some time.

One thing that I learned in the process was the need to limit the number of plants I was caring for ... and that I needed to keep my plants from touching each other ... or sharing water between them.

I also had to be careful about how I handled my plants. Mites can be spread very easily from plant to plant on your hands.

I now know the signs to look for, ... tight centers/ leaves crimping on the edges, and spray the suspect plants when I see anything like this.

But the biggest message is that I took plants like the one in your photo and brought it back to healthy growth using Azamax.

The photo is of a plant which developed a tight center ... which I was able to save with Azamax.

Good luck ...