Clever idea but many flaws.
I think this game could have benefited from some play testing before release. You can build a completely stealth disease and the governments will quickly begin to close their borders. Mutation points come quickly early off and then towards the end you hardly get any, when you need them the most. While a slow mutation may be slightly more realistic, it destroys any "fun" factor. There should be even more options for spreading the disease. "Sexually transmitted" and other obvious options aren't even included. It's not like this is a kids game.
Once all of the non-infected countries are closed up, the game becomes a boring wait until all of the infected population dies off. I think even after the borders are closed, there should still be a way for the disease to spread. Surely people would still try to sneak out of infected countries. If this is the way the game is going to be, then atleast have an even faster speed or the option to skip to the end. Honestly, leaving the room to wait for this to happen isn't my idea of a fun game.
Not to mention that your leader board is hacked, so you can't even aspire to get onto that. Great idea for a game (if not a little morbid) but it could use a lot of work. I hope to see a vastly improved third game.