Day
Sick
- Healthy
- Sick
- Recovered
- Vaccinated
Peak: -
Compare keeps this run's curve as a dashed line, then starts again with the same dots. Change a slider and see if the curve flattens.
How to play
- Watch the pink germ spread from dot to dot. The chart fills in below.
- Press Compare, then slide up masks, vaccines or distancing.
- Is the pink hill lower and wider than the dashed line? That's a flattened curve.
| Do this | Phone | Keyboard |
|---|---|---|
| Make a dot sick | Tap it | I (a random dot) |
| Pause / Play | Pause button | P |
| New run | Button | N |
| Compare | Button | C |
| Sliders | Drag | Tab + arrows |
What's happening?
- When a sick dot touches a healthy one, the germ might jump. The infection chance says how likely.
- Sick dots get better after a while and can't catch it again. Vaccinated dots never catch it.
- A mask halves the chance, on each side. Two masks: a quarter.
- Distancing means fewer dots wander about, so there are fewer meetings.
- A flat curve means fewer people are sick at the same time, so hospitals can cope.
Try this: find the smallest % vaccinated that stops the outbreak from taking off. That's called herd immunity. Does it change if you make the germ more catching?