Moderna (mRNA-1273) Covid-19 Vaccine, “A Systematic Review”


  • Meisha Imam Institute of Microbiology and Molecular genetics, University of the Punjab, Lahore 54000, Pakistan.
  • Rohama Zahid School of Biological Sciences, University of the Punjab, Lahore 54000, Pakistan
  • Hafiz Muhammad Rehan Institute of Microbiology and Molecular genetics, University of the Punjab, Lahore 54000, Pakistan.
  • Sidra Abid Institute of Microbiology and Molecular genetics, University of the Punjab, Lahore 54000, Pakistan.


Covid-19, mRNA based vaccine, Moderna (mRNA-1273), Mode of action, delta variant, Immune responses, Clinical Trials, Efficacy


A Global pandemic, declared by WHO, caused due to a deadly virus known as a “SARS-Cov-2”, has resulted in 4.3 million deaths. Its RNA based genome and lack of proofreading ability has made this virus more prone to get the frequent mutations and results in the formation of new variants and increased pathogenicity. Scientists had been trying hard to develop the ways through which this lethal virus could be eradicated, from the day the genome of SARS CoV-2 was first reported. In order to prevent from this viral infection more than 90 vaccines were developed but few of them were approved by FDA for the human trials. Moderna Inc came up with “mRNA-1273” vaccine which was given EUA approval on 18th December, 2020 by the FDA. The vaccine is based on active mRNA, translated into spike proteins of virus, is developed by the help of nanotechnology. The clinical trials have proved an efficacy of 94.1%. Moreover, the vaccine is able to prevent disease caused by the alpha, beta, gamma and delta variant of SARS-Cov 2 in recent studies. In this review article the composition, technology, mode of action, immune responses, clinical trials and efficacy as well as the comparison of moderna vaccine with other available covid-19 vaccines has been discussed.


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How to Cite

Imam, M. ., Zahid, R. ., Rehan, H. M. ., & Abid, S. . (2021). Moderna (mRNA-1273) Covid-19 Vaccine, “A Systematic Review”. International Journal of Sciences: Basic and Applied Research (IJSBAR), 60(2), 87–99. Retrieved from