Moderna Announces Publication in NEJM of Interim Results from Phase 1 Study of Its mRNA Vaccine (mRNA-1273) Against COVID-19; Neutralizing Antibody Titers Observed in 100% of Evaluated Participants; Phase 3 Study to Begin July 27

On July 14, 2020, Moderna, Inc. (Nasdaq:MRNA), a clinical-stage biotechnology company pioneering messenger RNA (mRNA) therapeutics and vaccines to create a new generation of transformative medicines for patients, announced the publication of an interim analysis of the open-label Phase 1 study of mRNA-1273, its vaccine candidate against COVID-19, in The New England Journal of Medicine ( The open-acccess article, published online today (July 14, 2020) is titled “An mRNA Vaccine Against SARS-CoV-2--Preliminary Report.” This interim analysis evaluated a two-dose vaccination schedule of mRNA-1273 given 28 days apart across three dose levels (25, 100, 250 µg) in 45 healthy adult participants ages 18-55 years, and reports results through Day 57. Results from participants in the initial dose cohorts who received both vaccinations and were evaluated at pre-specified timepoints reaffirm the positive interim data assessment announced ( on May 18th and show that mRNA-1273 induced rapid and strong immune responses against SARS-CoV-2. The study was led by the National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes of Health (NIH). mRNA-1273 was generally safe and well-tolerated, with no serious adverse events (SAEs) reported through Day 57. Adverse events (AEs) were generally transient and mild to moderate in severity. The most notable adverse events were seen at the 250 µg dose level, with three of those 14 participants (21%) reporting one or more severe events.
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