Dr. Yong Zhang has published a paper in the journal Chaos, Solitons and Fractals: the interdisciplinary journal of Nonlinear Science, and Nonequilibrium and Complex Phenomena called:
Applicability of time fractional derivative models for simulating the dynamics and mitigation scenarios of COVID-19
Read about it on the UA News website: www.ua.edu/news/2020/07/modeling-the-past-for-predicting-future-covid-19/
The paper can be viewed at: https://authors.elsevier.com/c/1bCOQ3QI~FPNdT