The best replacement for ppd is baby blues.

The best alternatives to ppd are rated as following:
★★★★★  baby blues
★★★★  ccd
★★★★  mantoux
★★★  mantoux test
★★  tb
★★  quantiferon
★★  quantiferon gold
★★  quintiles
★★  sleep deprivation
★  tst
★  tb test
★  chest x ray
★  igra
★  tb skin test
★  ppa
  chest x-ray
  t spot
  skin test
  ccd ach
  bcg
  pnp
  tuberculin skin test
  active tb

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

Other search terms related to ppd and their ratings are:
★★★★★ mmr
★★★★ bcg
★ active tb
You have in mind a companion for ppd and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of ppd in all years. Click on graph for more.
ppd
baby blues
ccd