Improving COVID-19 Forecasting using eXogenous Variables. - Mohammadhossein Toutiaee; Xiaochuan Li; Yogesh Chaudhari; Shophine Sivaraja; Aishwarya Venkataraj; Indrajeet Y. Javeri; Yuan Ke; Ismailcem Budak Arpinar; Nicole Lazar; John A. Miller 001 (CoRR, 2021)