Danny...
New, or not, your opinions are as valid as the opinions of anyone else posting on this forum.
If you Google FMV virus, I'm sure some photos will come up. There's plenty of pictures of diseased plants on this forum also. Blotchy, yellow-spotted leaves, are a sure sign. Once you see it, you'll know it. The plants look sick, and unhealthy.
According to some forum members, all trees have the virus, some just show symptoms, and, some don't. Personally, I think the jury is still out on that. Not one tree up here in The Bronx, or surrounding areas, have symptoms of FMV and they are all clean, and healthy.
Worry about bringing it to you collection from the West-Coast sources, like UC Davis, and some nurseries from the same areas. I always ask if plants are symptomatic, and I've cancelled orders from Edible Landscaping.
Good luck.
Frank