When you start, there will be a bunch of cats. Soon, a sick cat will appear, and if it touches a healthy cat, it might get sick. This animation is meant to teach about how viruses spread. This animation may not be accurate.
I got this idea from code.org's outbreak simulator V1: When a sick cat touches a healthy cat, the healthy cat may get sick (when infected the cat will appear somewhere else) V1.1 Renamed Infection to "Epidemic" V2 Added vaccines. Vaccinated cats have less of a chance to catch virus. Preview V3: Masks on
