García-Mendoza, M. et al. 2022. IgG antibody response by ELISA using Wuhan And Lambda variant antigens in BBIBP-CORV vaccinated health care workers. Revista Peruana de Medicina Experimental y Salud Pública. 39, 3 (Sep. 2022), 267–73. DOI:https://doi.org/10.17843/rpmesp.2022.393.10875.