Colmenares-Mejía, Claudia C, et al. “Seroprevalence of SARS-CoV-2 Infection Among Vaccinated Health Workers and Hospital Staff”. Archives of Clinical and Biomedical Research, vol. 6, no. 2, Mar. 2022, pp. 290-5, https://fortunejournals.org/ojs/index.php/acbr/article/view/14911.