Laboratory of Engineering Sciences for Energy School of Applied Sciences Doukkali University Jadida;
Department of Mathematics of Sciences Doukkali University Jadida;
Department of Mathematics University-Hudaydah;
Department of Mathematics and Sciences Sultan University Arabia;
Department of Mathematics of Malakand Dir(L) Pakhtankhawa;
Department of Medical Research Medical University;
Fractional calculus; caputo derivatives; COVID-19; reproduction number; future prediction;