I've stumbled upon a pretty cool flash game, not sure how new it is but I'm having quite a bit of fun with it!
http://www.crazymonkeygames.com/Pandemic-2.htmlWhat you do is you start off with a basic virus, bacteria, whatever in a region of the world and it is your job to build it into a pandemic.
I'm still playing my first game with a strand of bacteria I've named Deadmuller. It started out with only one symptom, vomiting. It's grown a bit now and is infecting a few more people and that allowed me to add dementia to Deadmuller's symptoms.
I am almost able to add a "tier 3" symptom which I have decided will be.. INSANITY.
I'm having fun with this little sucker. I'm aiming to create some sort of zombification virus and I think this might work out! I can't wait for Deadmuller to hit China, gahaha....