Actually, I take that back. My virus was not a virus at all. xD I actually used the parasite. To all having trouble: Stick with the parasite. Make it cause something that will infect easily for a few days. Then turn off all symptoms, raise resistances to 2-2-2-1. Let your country spread to others, hopefully deal with Madagascar (Or start there like I did!) Once you have infected everywhere, start by upgrading all your resistances to max, or at least 3-3-3-3. Then just upgrade your symptoms to help infectivity. Make sure you have infected EVERYONE, then turn on the deadly symptoms and watch your parasite go to town.
It's just plain funny. I started in madagascar, using the Virus. Note for everyone that is aiming for that impossible badge: You want to be extremely infective for about a day or two. Let the disease do it's job and infect a ton of people there. Since madagascar is the best at locking itself up, people think it's safe there. Ships enter while everyone is secretly infected with your virus. The ship leaves with the newly infected people, stops somewhere new. Most likely, that place has an airport. I just let it sit there, magically infecting everyone with 2-2-2-1 resistances. Next thing I knew, it had infected everywhere. Sent it into full-blown symptoms mode with high resistances, vaccine didn't work. Now I'm finishing off the world.
 "Pandemic 2"){kind=icon}