A., K. Y., M. M. D, T. D. W, A. S, M. M. A, I. T. A, H. H. A, H. K. Y, and U. B. R. “Chronic Hepatitis B Virus Infection and Rubella Susceptibility Among Obstetric Population in Metropolis Antenatal Centre Kano, Nigeria”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 7, no. 1, Apr. 2014, pp. 1-14, https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/520.