J. P. S. Peron and H. Nakaya, “Susceptibility of the Elderly to SARS-CoV-2 Infection: ACE-2 Overexpression, Shedding, and Antibodydependent Enhancement (ADE)”, Clinics, vol. 75, p. e1912, May 2020, doi: 10.6061/clinics/2020/e1912.