On Jul. 14, 2020, Moderna 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. This interim analysis evaluated a two-dose vaccination schedule of mRNA-1273 given 28 days apart across three dose levels (25, 100, 250 ﾵg) 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 mRNA-1273 induced rapid and strong immune responses against SARS-CoV-2.