The best replacement for zoster is simplex.

The best alternatives to zoster are rated as following:
★★★★★  simplex
★★★★  herpes simplex
★★★  varicella
★★★  genital herpes
★★  shingles
★★  hsv
★  herpes simplex 1
★  chicken pox
★  varicella zoster
★  hsv 1
★  hsv 2
★  herpes zoster
  herpes 2
  poison ivy
  shingles is
  localized herpes zoster
  disseminated
  hsv2

Your alternative for zoster is not listed? Suggest!
Speaking about zoster, one probably shouldn't forget about ophthalmic complications.

Other search terms related to zoster and their ratings are:
★★★★★ ophthalmic complications
★ neuralgia
You have in mind a companion for zoster and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of zoster in all years. Click on graph for more.
zoster
simplex
herpes simplex