In the US, confirmed coronavirus cases double every 2nd to 3rd day. China, South Korea, Japan have already a flat curve.

Cumulative numbers of confirmed cases in selected countries after the 100th case, last updated with the numbers from yesterday. These numbers don't tell us anything about the number of infected people, just about the number of people who got tested positive.

The helper slopes don't mark corridors. For example, Europe has a doubling rate of less than three days now – the "...every 3rd day" slope is steeper than the Europe line.

The chart stops at day 37, but more than 50 days have passed since China reported their 100th case. China reports a bit over 80,800 cases to date. The 100th cases of all countries are aligned and therefore approximated. The source didn't report values for China before their 500th case, so the numbers of days passed after their 100th case is estimated.