[blencdr]

Right, in some countries doubling was every 3 days.

[mikekchar]

Have a look at this site: https://www.worldometers.info/coronavirus/country/us/

Scroll down to "Daily New Cases in the United States". No real need to extrapolate data from other countries. New cases are doubling every 2-3 days.

[btilly]

Those aren't cases, those are confirmed cases. Which has more to do with how much testing we have done than how many are sick.

[pintxo]

Problem with looking at case numbers is, you need to know how many tests have been executed. If they doubled the number of tests within those 3 days, then you measure the increase in tests, not an increase in cases.

[paganel]

That was the case for Italy until 4-5 days ago and I think it still is for Spain, definitely for Germany.