M. Bedoya-Sommerkamp, J. Medina-Ranilla, V. Chau-Rodríguez, R. Li-Soldevilla, Álvaro Vera-Albújar, and P. J. García, “SARS-CoV-2 variants: epidemiology, pathophysiology and the importance of vaccines”, Rev Peru Med Exp Salud Publica, vol. 38, no. 3, pp. 442–51, Sep. 2021, doi: 10.17843/rpmesp.2021.383.8734.