After my review of the Pfizer/BioNTech SARS-CoV-2 virus vaccine, I was regularly asked if I would do the same for the Moderna vaccine. I will do that in this blog. Regarding a discussion of the study into the efficacy and safety of the Pfizer/BioNTech vaccine, I refer you to one of my previous blogs: https://www.janbhommel.com/post/het-pfizer-biontech-vaccin-tegen-het-sars-cov-2-virus Comment: See here for the English translation of his blog on the Pfizer/BioNTech vaccine: What Pfizer/BioNTech isn’t telling us about the new mRNA COVID-19 vaccine The study into efficacy and safety of the Moderna vaccine against SARS-CoV-2 virus was published on December 30 in the New England Journal of Medicine (NEJM) (1). This study shows great similarities to the Pfizer/BioNTech vaccine efficacy and safety study, however there are some differences. Overall, the Moderna study makes a better impression than the Pfizer/BioNTech study, as I will discuss below.