Alsayed, R., K. Zainulabdeen, I. Salman, N. Hairunisa, H. Amalia, R. M. Yusop, A. M. Redwan, and E. Yousif. “Comparative Studies about Vaccine Development for COVID-19”. Jurnal Biomedika Dan Kesehatan, vol. 6, no. 1, Apr. 2023, pp. 127-32, doi:10.18051/JBiomedKes.2023.v6.127-132.