The best replacement for vaccination is immunization.

The best alternatives to vaccination are rated as following:
★★★★★  immunization
★★★  inoculation
★★  non vaccination
★★  variolation
★  vaccine
★  natural immunity
★  no vaccination
  titer
  immunity
  immunisation
  sanitation
  flu mist
  herd immunity
  gamma globulin

Your alternative for vaccination is not listed? Suggest!
Speaking about vaccination, one probably shouldn't forget about tetanus.

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



Google Trends

Scale is based on the average worldwide traffic of vaccination in all years. Click on graph for more.
vaccination
immunization
inoculation