The best replacement for west nile is malaria.

The best alternatives to west nile are rated as following:
★★★★★  malaria
★★  dengue
★  bird flu
★  eee
★  swine flu
  triple e

Your alternative for west nile is not listed? Suggest!
Speaking about west nile, one probably shouldn't forget about ewt.

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



Google Trends

Scale is based on the average worldwide traffic of west nile in all years. Click on graph for more.
west nile
malaria
dengue