“…Due to the cross-over behavior, the fractional operator having Mittag-Leffler kernel i.e., Atangana-Baleanu fractional differential operator can best explain the complex dynamics of epidemiological problems ( Abdullah et al, 2021 ; S. Ahmad et al, 2020 ; Z. Ahmad et al, 2020a ; Arfan et al, 2021 ; Naik et al, 2020 ; Qureshi et al, 2019a , Qureshi et al, 2019b ; Qureshi and Yusuf, 2019b , Qureshi and Yusuf, 2019a ; Shah et al, 2020 ; Shatanawi et al, 2021 ). Qureshi et al predicted the transmission of varicella zoster virus via different fractional operators i.e., Caputo, Caputo Fabrizio (CF) and Atangana-Baleanu (AB) fractional operators ( Qureshi et al, 2019b ).…”