[mvanaltvorst]

You can't extrapolate the spread of viruses using an exponential function, you have to use a logistic function. Unfortunately, there isn't enough data to accurately fit a logistic function right now.

[perl4ever]

My mathematical intuition may not be any good, but if you are saying it will be a sigmoid type curve, would doubling the time be plausible?

But this is not in disagreement with my comment, since this would involve slowing down.

[jgalt212]

Tell that to the "shutdown the world people". The entire basis of this response is the exponential function.

[2snakes]

With physical distancing, it may be exponential at first, but then taper off, like it did in Wuhan: https://www.calcalistech.com/ctech/articles/0,7340,L-3800632...