Singh, Jagtar, and Seema Thakur. 2022. “Immunogenicity of a Single Dose MRNA Vaccine in SARS-CoV-2 Exposed Subjects: A Systematic Review”. South East Asia Journal of Medical Sciences, September, 1-13. https://www.littlebaypublishers.com/index.php/seajournalms/article/view/85.