This is my friend Amaryllis. I am not sure is it HiMV or not.
I looks like it to me but I could be wrong. Here is a picture of a virused plant that was over at my father's several years ago. Your leaves have a different look but as your climate is probably much hotter than mine that 'might' account for the bleached lighter look to your leaves.
Again, this is just my opinion but I wouldn't let this plant, however special it may be, near mine!!
Unfortunately, that is mosaic virus. Those "blocky" patches of light and dark green are very characteristic.
Yep, looks too familiar! YIKES!
I just lost most of my bulbs to HMV and that looks like a pretty bad case. Which hybrid is that? The virus will appear differently in different hybrids. Also, I think that papilio and 'Half and Half' might be immune. Some hybrids appear to be more susceptible.