This game is about helping a well known virus to survive.
Each level starts with a single sick person. Without action, this person will heal (or die in rare cases), preventing the virus to spread.
The game consists in selecting an attack in the left panel, then clicking a sick person (red face) on the screen, trying to contaminate other people.
A level is successful when there is at least one living sick person in the game at the end of the countdown.