evidence: Two mRNA vaccines developed by Pfizer Biontech and Moderna have demonstrated impressive levels of immunity against SARS CoV-2 virus in randomised controlled trials (5,6). This relatively new technology had several advantages that made it one of the earliest vaccines to be developed, tested, scaled up and subsequently approved for use all over the world. The potency of the immune response is another significant advantage of mRNA vaccine as suggested by previous in vitro and animal experiments (7).