Yeah, this is an awesome concept for a game, quite unique (as far as I know). But there's always room for improvement.
Don't be afraid to break away from realism slightly by giving the player more control over where and how their disease travels. They should be fighting against the world's response to infection, not luck.
I'm looking forward to the next outbreak!
 "Vector Runner"){kind=icon}
 "Pandemic 2"){kind=icon}