This is a simulator of a pandemic. Click cats to interact with them. If you are in sicken mode, the cat will become sick, but if you are in vaccinate mode, the cat will become vaccinated. Vaccinated cats have a light blue outline. Space to change modes. When an unvaccinated cat touches a sick cat, it becomes sick too. Nothing happens to a vaccinated cat, however, sick cats don't recover. Press M to mute the music.
