United States #CoronaVirus Update:

I& #39;ve found a severe error in the formulation of the IMHE COVID-19 CurveFit program ( https://ihmeuw-msca.github.io/CurveFit/methods/).">https://ihmeuw-msca.github.io/CurveFit/... The form of the Generalized Logistic function used has been over-simplified and forces the IMHE model growth curve to be symmetrical.

Because of this error in the model& #39;s formulation, it only predicts generalized growth curves that are symmetrical with central inflection points (see example below).

The & #39;α& #39; term changes the slope, the & #39;β& #39; term changes the time of the inflection point, and the & #39;p& #39; term changes the magnitude of the change.

Here& #39;s a form of the Generalized Logistic Function that allows the growth curve to be asymmetrical using the "nu" term.