Data from Moderna COVID-19 Vaccine Trial Reported in December 30 NEJM Article; Data Shows 94.1 Percent Efficacy for mRNA-1273 Vaccine Candidate

A peer-reviewed paper published online on December 30, 2020 in The New England Journal of Medicine provides data from the much-anticipated COVE study, which evaluated mRNA-1273, a vaccine candidate against COVID-19 manufactured by Moderna, Inc. Results from the primary analysis of the study, which will continue for two years, provide evidence that the vaccine can prevent symptomatic infection. Among the more than 30,000 participants randomized to receive the vaccine or a placebo, 11 of those in the vaccine group developed symptomatic COVID-19 compared to 185 participants who received the placebo, demonstrating 94.1 percent efficacy in preventing symptomatic COVID-19. Cases of severe COVID-19 occurred only in participants who received the placebo. Brigham and Women's Hospital served as a site for the trial as part of the COVID-19 Prevention Network (CoVPN), funded by the National Institutes of Health. In addition, Lindsey Baden, MD, an infectious diseases specialist at the Brigham and an expert in vaccine development for viral diseases, served as Co-Principal Investigator for the study and lead author of the paper. The open-access NEJM article is titled "Efficacy and Safety of mRNA-1273 SARS-CoV-2 Vaccine.” "Our work continues. Over the next months, we'll have increasing amounts of data to better define how this vaccine works, but the results so far show a 94.1 percent efficacy. These numbers are compelling," said Dr. Baden. "And, importantly, the data suggest protection from severe illness, indicating that the vaccine could have an impact on preventing hospitalizations and deaths, at least in the first several months post-vaccination."
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