Think the damage on Komodo Dragon is weather realated not HVX. As far as HVX being transmitted from a plant in a joint bed, if someone is digging in the bed, and cuts the roots of a diseased and healthy plant, the disease can be transmitted, or by somebody weed-whacking, or cutting scapes etc. It does not spread just by touching, it is by sap that the disease is passed on.

I defer to those who know better than I, but if it were mine I would be inclined to think freeze and frost damage with the veins in pic 2 damaged by water freezing in them, and the tiny spots in pic 1 by particles of ice as in frost.

I hope I am learning, so I now open myself up to being corrected, which doesn't bother me a bit.

Les