After four hours of playing, I finally beat it! This guide is great, just the refreshing to get a good spot on the map was a pain in my bum! I started in Cuba (started with fever and airbourne). Basically, everywhere was infected but Japan and Madagascar by day 15, so I bought waterbourne and they were both infected two days later so everyone was infected by day 17. Completely wiped out human population by day 76. :))) Thank you!