thats stupid.. i followed that guide and i was lucky able to get madagascar as my starting point and the us,peru,brazil and middle east didnt get infected.
just got all the achievements, if you want the "never gonna let you down badge"
choose these as for the options:
Shapes: Sky
Pattern: In & out
Motion: Fixed
Randomize: Off
and you'll be able to get it. your welcome
btw i dont think i hit any red notes when i was doing it.
 "Pandemic 2"){kind=icon}
 "Music Catch 2"){kind=icon}