The binding energies calculated here for nCOV-2019 and SARS-COV (−50.22 ± 1.93 and −18.79 ± 1.53 kcal/mol, respectively) are in good agreement with the binding energies calculated using the generalized Born method by Spinello et al.30 Moreover, the patterns of H-bonds between nCOV-2019 and ACE2 were also already characterized by other groups26,30 which agrees with our work.