“…The Caputo derivative serves best as a base model and is preferred over Riemann-Liouville fractional derivative for formulating epidemiological models for the obvious reasons concerning the use of initial and boundary conditions and the differentiation of a constant being zero. For more details one can refer to the following researches [4], [7], [8], [18], [20], [23], [25], [26], [36], [40], [47], [52], [54], [58], [62].…”