You thought you found the cure, but what happens when the diseases get stronger? When your first epidemic appears, one of the diseases will become the Virulent Strain, a more aggressive and trickier disease. This disease can spread faster and is more difficult to cure, creating a new challenge for you and your team. Work together to utilize your special skills and contain this new pandemic! Can you save humanity?

Go to: http://store.steampowered.com/ and download STEAM client Click "Install Steam" (from the upper right corner) Install and start application, login with your Account name and Password (create one if you don't have). Please follow these instructions to activate a new retail purchase on Steam: Launch Steam and log into your Steam account. Click the Games Menu. Choose Activate a Product on Steam... Follow the onscreen instructions to complete the process. After successful code verification go to the "MY GAMES" tab and start downloading.