Great game. I actually found level 30 to be pretty easy. 23 was definitely the hardest for me, 1/4 of the whole time it took me to beat the game was on level 23 =D
25 days - All countries have infected people in them... then the 2 people infected in madagascar died without anyone else there getting infected... >.<
Maybe with a flaming blade or a non slahing weapon ? :)