This study aims to discuss the prevalence of COVID-19 in U.S, Italy, Spain, France and China, where the virus spreads most rapidly and causes tragic outcomes. Thereafter, we present new insights of existence and uniqueness solutions of the 2019-nCoV models via fractional and fractal-fractional operators by using fixed point methods.
Keywords: 2019-nCoV model; Fixed point; Fractal-fractional integral for Mittag-Leffler kernel; Fractional integral for Mittag-Leffler kernel.
© 2020 The Author(s).