L-histidine is an expensive way to bind copper, give him some high sulfur foods if you dont have MSM...on second thought those are full or Arginine and will flare up the HSV-3.
If you aren't chelating regularly you need a ton of Se, also will find all sorts of tiny cancers everywhere to check your Retro.Vs reqularly and keep up the Se.
I think 1200mcg was my high end on that...