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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.

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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.

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

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...

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