“Genetic Variations in the Orf7a Protein of SARS-CoV-2 and Its Possible Role in Vaccine Development”. Biomedical Research and Therapy 8, no. 8 (August 28, 2021): 4497–4504. Accessed April 4, 2025. https://preservation.bmrat.org/index.php/BMRAT/article/view/688.