Donia, A., et al. “Seroprevalence of IgG Antibodies Against SARS-CoV-2 N Protein Among Vaccinated and Unvaccinated Subjects in Lahore, Pakistan”. Acta Medica Bulgarica, vol. 51, no. 1, Mar. 2024, pp. 30-35, https://doi.org/10.2478/amb-2024-0005.