Safety and Immunogenicity Study of 2019-nCoV Vaccine (mRNA-1273) for Prophylaxis of SARS-CoV-2 Infection (COVID-19)

Summary

This is a phase I, open-label, dose-ranging clinical trial in males and non-pregnant females, starting at 18 years of age, inclusive, who are in good health and meet all eligibility criteria. This clinical trial is designed to assess the safety, reactogenicity and immunogenicity of mRNA-1273 manufactured by ModernaTX, Inc. mRNA-1273 is a novel lipid nanoparticle (LNP)-encapsulated mRNA-based vaccine that encodes for a full-length, prefusion stabilized spike (S) protein of SARS-CoV-2. Enrollment will occur at up to 3 domestic clinical research sites. Up to one hundred and fifty-five subjects will be enrolled into one of thirteen cohorts (10 micrograms \[mcg\], 25 mcg, 50 mcg, 100 mcg, and 250 mcg). Subjects will receive an intramuscular (IM) injection (0.5 milliliters \[mL\]) of mRNA-1273 on Days 1 and 29 in the deltoid muscle and will be followed through 12 months post second vaccination (Day 394). Follow-up visits will occur 1, 2, and 4 weeks post each vaccination (Days 8, 15, 29, 36, 43, and 57), as well as 3, 6, and 12 months post second vaccination (Days 119, 209, and 394). The primary objective is to evaluate the safety and reactogenicity of a 2-dose vaccination schedule of mRNA-1273, given 28 days apart, across 5 dosages in healthy adults. Optional Substudy: This is an optional third mRNA-1273 vaccination substudy, in subjects 18 years of age and older, who received both the first and second mRNA-1273 vaccinations in the main study and meet all other substudy eligibility criteria. This optional third mRNA-1273 vaccination substudy is designed to assess safety, reactogenicity, and immunogenicity through 12 months post third vaccination (Day 731). Subjects who receive the third mRNA-1273 vaccination will exit the Schedule of Activities for the main study and will enter the Schedule of Activities for the optional substudy. Up to one hundred and twenty subject will be enrolled into two cohorts (consisting of participating subjects who received 2 doses of 25 or 50 mcg and participating subjects who received 2 doses of 100 and 250 mcg). Subjects will receive an IM injection (0.5 mL) at a dosage of 100 mcg/0.5 mL. The primary objective is to evaluate the safety and reactogenicity of a third mRNA-1273 vaccination, at a dosage of 100 mcg.

Timeline

Start

2020-03-16

Primary completion

2022-04-26

Completion

2022-04-26

Publications

• Bangaru S, Jackson AM, Copps J, Fernandez-Quintero ML, Torres JL, Richey ST, Nogal B, Sewall LM, Torrents de la Pena A, Rehman A, Guebre-Xabier M, Girard B, Das R, Corbett-Helaire KS, Seder RA, Graham BS, Edwards DK, Patel N, Smith G, Ward AB. Structural serology of polyclonal antibody responses to mRNA-1273 and NVX-CoV2373 COVID-19 vaccines. Cell Rep. 2025 Jul 22;44(7):115986. doi: 10.1016/j.celrep.2025.115986. Epub 2025 Jul 8.
• Anderson E, Jackson L, Rouphael N, Widge A, Montefiori D, Doria-Rose N, Suthar M, Cohen K, O'Connell S, Makowski M, Makhene M, Buchanan W, Spearman P, Creech CB, O'Dell S, Schmidt S, Leav B, Bennett H, Pajon R, Posavad C, Hural J, Beigel J, Albert J, Abebe K, Eaton A, Rostad C, Rebolledo P, Kamidani S, Graciaa D, Coler R, McDermott A, Ledgerwood J, Mascola J, DeRosa S, Neuzil K, McElrath MJ, Roberts P. Safety and Immunogenicity of a Third Dose of SARS-CoV-2 mRNA Vaccine - An Interim Analysis. Res Sq [Preprint]. 2022 May 3:rs.3.rs-1222037. doi: 10.21203/rs.3.rs-1222037/v1.
• Jochum S, Kirste I, Hortsch S, Grunert VP, Legault H, Eichenlaub U, Kashlan B, Pajon R. Clinical Utility of Elecsys Anti-SARS-CoV-2 S Assay in COVID-19 Vaccination: An Exploratory Analysis of the mRNA-1273 Phase 1 Trial. Front Immunol. 2022 Jan 19;12:798117. doi: 10.3389/fimmu.2021.798117. eCollection 2021.
• Garrett ME, Galloway JG, Wolf C, Logue JK, Franko N, Chu HY, Matsen FA 4th, Overbaugh JM. Comprehensive characterization of the antibody responses to SARS-CoV-2 Spike protein finds additional vaccine-induced epitopes beyond those for mild infection. Elife. 2022 Jan 24;11:e73490. doi: 10.7554/eLife.73490.
• Jochum S, Kirste I, Hortsch S, Grunert VP, Legault H, Eichenlaub U, Kashlan B, Pajon R. Clinical utility of Elecsys Anti-SARS-CoV-2 S assay in COVID-19 vaccination: An exploratory analysis of the mRNA-1273 phase 1 trial. medRxiv [Preprint]. 2021 Oct 19:2021.10.04.21264521. doi: 10.1101/2021.10.04.21264521.
• Mendes BB, Sousa DP, Conniot J, Conde J. Nanomedicine-based strategies to target and modulate the tumor microenvironment. Trends Cancer. 2021 Sep;7(9):847-862. doi: 10.1016/j.trecan.2021.05.001. Epub 2021 Jun 3.
• Anderson EJ, Rouphael NG, Widge AT, Jackson LA, Roberts PC, Makhene M, Chappell JD, Denison MR, Stevens LJ, Pruijssers AJ, McDermott AB, Flach B, Lin BC, Doria-Rose NA, O'Dell S, Schmidt SD, Corbett KS, Swanson PA 2nd, Padilla M, Neuzil KM, Bennett H, Leav B, Makowski M, Albert J, Cross K, Edara VV, Floyd K, Suthar MS, Martinez DR, Baric R, Buchanan W, Luke CJ, Phadke VK, Rostad CA, Ledgerwood JE, Graham BS, Beigel JH; mRNA-1273 Study Group. Safety and Immunogenicity of SARS-CoV-2 mRNA-1273 Vaccine in Older Adults. N Engl J Med. 2020 Dec 17;383(25):2427-2438. doi: 10.1056/NEJMoa2028436. Epub 2020 Sep 29.
• Jackson LA, Anderson EJ, Rouphael NG, Roberts PC, Makhene M, Coler RN, McCullough MP, Chappell JD, Denison MR, Stevens LJ, Pruijssers AJ, McDermott A, Flach B, Doria-Rose NA, Corbett KS, Morabito KM, O'Dell S, Schmidt SD, Swanson PA 2nd, Padilla M, Mascola JR, Neuzil KM, Bennett H, Sun W, Peters E, Makowski M, Albert J, Cross K, Buchanan W, Pikaart-Tautges R, Ledgerwood JE, Graham BS, Beigel JH; mRNA-1273 Study Group. An mRNA Vaccine against SARS-CoV-2 - Preliminary Report. N Engl J Med. 2020 Nov 12;383(20):1920-1931. doi: 10.1056/NEJMoa2022483. Epub 2020 Jul 14.

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Indications