Vaccine Info

mRNA-1273 SARS-CoV-2 Vaccine

mRNA-1273 Vaccine Description

mRNA-1273 is an mRNA vaccine candidate against the novel coronavirus SARS-CoV-2 encoding for a prefusion stabilized form of the Spike (S) protein, which was selected by Moderna in collaboration with investigators at the NIAID Vaccine Research Center (VRC).

mRNA is an information molecule and Moderna designs its mRNA vaccines using the sequence of the virus, not by working on the virus itself. This mRNA platform provides significant advantages in speed and efficiency, across basic science, manufacturing, and clinical development. 

The S protein complex is necessary for membrane fusion and host cell infection and has been the target of vaccines against the coronaviruses responsible for Middle Eastern Respiratory Syndrome (MERS) and Severe Acute Respiratory Syndrome (SARS).

The first clinical batch, which was funded by the Coalition for Epidemic Preparedness Innovations, was completed on February 7, 2020, and underwent analytical testing; it was shipped to NIH on February 24th, 42 days from sequence selection.

The first participant in the NIH-led Phase 1 study of the mRNA-1273 vaccine was dosed on March 16th, 63 days from sequence selection to Phase 1 study dosing. A Phase 2 study is expected to begin in Q2 2020, following safety data from an ongoing Phase 1 study.

With the Phase 3 dose being finalized at 100 μg, the Company remains on track to be able to deliver approximately 500 million doses per year, and possibly up to 1 billion doses per year, beginning in 2021 from the Company’s internal U.S. manufacturing site and strategic collaboration with Lonza.

Moderna previously collaborated with the NIH on a vaccine for MERS-CoV, which is a different type of coronavirus than the current SARS-CoV-2 pandemic. This program was only at the research stage and was not tested in humans.

Funding from the Biomedical Advanced Research and Development Authority partially supported the planning for Phase 2 and Phase 3 studies of mRNA-1273 and is supporting the execution of these studies, as well as the manufacturing process scale-up of mRNA-1273.

Headquartered in Cambridge, Mass., Moderna has been named a top biopharmaceutical employer. To learn more, visit 

mRNA-1273 Vaccine Dosage

Based on the results of the Phase 1 study, the 100 μg dose level was chosen as the optimal dose level to maximize the immune response while minimizing adverse reactions.

    mRNA-1273 Vaccine News

    July 1, 2020 - Inside Moderna: The COVID Vaccine Front-Runner With No Track Record and an Unsparing CEO.

    June 25, 2020 - Moderna and Catalent, Inc. announced a collaboration for large-scale, commercial fill-finish manufacturing of Moderna’s mRNA-based COVID-19 vaccine candidate (mRNA-1273) at Catalent’s biologics facility in Indiana. As part of the agreement, Catalent will provide manufacturing operations at the site to support the production of an initial 100 million doses of the vaccine candidate intended to supply the U.S. market starting in the third quarter of 2020. 

    June 17, 2020 - Reuters reported Israel has signed an agreement with Moderna for the future purchase of its potential COVID-19 vaccine.

    June 11, 2020 - A non-peer-reviewed study of Moderna Inc.'s COVID-19 vaccine candidate in mice lends some assurance that it will not increase the risk of more severe disease and that 1-dose may provide protection against the novel coronavirus. This study showed that mRNA-1273 vaccination induces both potent neutralizing antibody and CD8 T cell responses and protects against SARS-CoV-2 infection in the lungs and noses of mice without evidence of immunopathology.

    June 11, 2020 - Moderna announced progress on the late-stage development of mRNA-1273, the Company’s mRNA vaccine candidate against COVID-19. Moderna has finalized the Phase 3 study protocol based on feedback from the U.S. FDA. The randomized, 1:1 placebo-controlled trial is expected to include approximately 30,000 participants enrolled in the U.S. and is expected to be conducted in collaboration with the National Institute of Allergy and Infectious Diseases. 

    June 2, 2020 - Moderna, Inc. announced new research to be highlighted at the Company’s third annual Science Day. The program is designed to provide insight into the continued diverse efforts underway at Moderna and with collaborators to better understand how to use mRNA as medicine and underscores the Company’s continued commitment to basic science and innovation.

    May 29, 2020 - Moderna, Inc. announced that the first participants in each age cohort have been dosed in the Company’s Phase 2 study of its mRNA vaccine candidate (mRNA-1273) against the novel coronavirus SARS-CoV-2.

    May 18, 2020 - Moderna announced positive interim clinical data of mRNA-1273, its vaccine candidate against novel coronavirus (SARS-CoV-2), from the Phase 1 study led by the NIAID. “These interim Phase 1 data, while early, demonstrate that vaccination with mRNA-1273 elicits an immune response of the magnitude caused by natural infection starting with a dose as low as 25 µg,” said Tal Zaks, M.D., Ph.D., Chief Medical Officer.

    May 12, 2020 - Moderna, Inc. announced that the U.S. FDA has granted Fast Track designation for the Company’s mRNA vaccine candidate (mRNA-1273) against the novel coronavirus (SARS-CoV-2). Previously, on May 6th, the FDA said it completed the review of the Investigational New Drug (IND) application for mRNA-1273 allowing it to proceed to a Phase 2 study, which is expected to begin shortly. And, Moderna said it is finalizing the protocol for a Phase 3 study, expected to begin in the early summer of 2020. 

    May 8, 2020 - 'If Moderna’s coronavirus vaccine proves to work, the company anticipates working “very closely” with the U.S. government to determine 'who' will get the first mRNA-1273 doses, CEO Stephane Bancel told CNBC.

    May 7, 2020 - Stéphane Bancel, Moderna’s Chief Executive Officer, said in a press statement, “The imminent Phase 2 study start is a crucial step forward as we continue to advance the clinical development of mRNA-1273, our vaccine candidate against SARS-CoV-2. With the goal of starting the mRNA-1273 pivotal Phase 3 study early this summer, Moderna is now preparing to potentially have its first Biologics License Application approved as soon as 2021."

    May 1, 2020 - Moderna, Inc. and Lonza Ltd. today announced a 10-year strategic collaboration agreement to enable larger-scale manufacture of Moderna’s mRNA vaccine (mRNA-1273) against the novel coronavirus (SARS-CoV-2) and additional Moderna products in the future.

    April 27, 2020 - Moderna, Inc. announced that it has submitted an IND application to the U.S. FDA for the company’s mRNA vaccine candidate (mRNA-1273) against the SARS-CoV-2 coronavirus to evaluate mRNA-1273 in Phase 2 and late-stage studies if supported by safety data from the Phase 1 study led by the National Institute of Allergy and Infectious Diseases.

    April 23, 2020 - The USA Today reports the Seattle volunteers who got shots in the first trial of a possible coronavirus vaccine are now getting the second shot — an indicator the early trial is progressing well. The doctors at Kaiser Permanente's Vaccine Treatment and Evaluation Unit in Seattle don’t know the results of the first round of tests, said Lisa Jackson, who is leading the study.

    April 16, 2020 - Moderna, Inc. announced an agreement for a commitment of up to $483 million from the Biomedical Advanced Research and Development Authority (BARDA), a division of the Office of the Assistant Secretary for Preparedness and Response (ASPR) within the U.S. Department of Health and Human Services (HHS), to accelerate the development of the Company’s mRNA vaccine candidate (mRNA-1273) against the novel coronavirus SARS-CoV-2.

    March 27, 2020 - The NIH announced that Emory University in Atlanta will begin enrolling healthy adult volunteers ages 18 to 55 years in the NIH-led Phase 1 study of mRNA-1273. 

    March 16, 2020 - Moderna, Inc. announced that the first participant has been dosed in the Phase 1 study of the Company’s mRNA vaccine (mRNA-1273) against the novel coronavirus (SARS-CoV-2). This Phase 1 study is being conducted by the National Institutes of Health under its own Investigational New Drug application.

    February 24, 2020 - Moderna, Inc. announced that it has released the first batch of mRNA-1273, the Company’s vaccine against the novel coronavirus, for human use. Vials of mRNA-1273 have been shipped to the National Institute of Allergy and Infectious Diseases, a part of the National Institutes of Health to be used in the planned Phase 1 study in the U.S.

    January 23, 2020 - Moderna, Inc. announced a new collaboration to develop an mRNA vaccine against the novel coronavirus SARS-CoV-2.

    January 13, 2020 - The U.S. National Institutes of Health (NIH) and Moderna’s infectious disease research team finalized the sequence for mRNA-1273, the Company’s vaccine against the novel coronavirus. At that time, the National Institute of Allergy and Infectious Diseases (NIAID), part of NIH, disclosed their intent to run a Phase 1 study using the mRNA-1273 vaccine in response to the coronavirus threat and Moderna mobilized toward clinical manufacture. The manufacture of this batch was funded by the Coalition for Epidemic Preparedness Innovations (CEPI).

    mRNA-1273 Vaccine Definition

    Messenger RNA, or mRNA, plays a fundamental role in human biology, transferring the instructions stored in DNA to make the proteins required in every living cell.

    mRNA is a single-stranded molecule that carries genetic code from DNA in a cell’s nucleus to ribosomes, the cell’s protein-making machinery. mRNA medicine instructs a patient’s own cells to produce proteins that could prevent, treat, or cure disease.

    The mRNA sequence to the cells responsible for making the protein via one of several modalities. Reaching different types of cells requires different delivery methods.

    mRNA-1273 Vaccine Clinical Trial 

    • NCT04283461 Phase 1 - 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. 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.
    • NCT04405076 Phase 2 - The first cohort of healthy adults ages 18-54 years (n=300) in the Phase 2 study of mRNA-1273 is fully enrolled, 13 days after the first participant was dosed. The sentinel participants in the cohort of older adults ages 55 years and above (n=50) is fully enrolled. This Phase 2 study, being conducted by Moderna, is evaluating the safety, reactogenicity, and immunogenicity of two vaccinations of mRNA-1273 given 28 days apart. The Company intends to enroll 600 healthy participants across two cohorts of adults ages 18-54 years (n=300) and older adults ages 55 years and above (n=300). Each participant will be assigned to receive a placebo, a 50 μg or a 100 μg dose at both vaccinations. Participants will be followed through 12 months after the second vaccination.
    • Phase 3 - Moderna has finalized the Phase 3 study protocol based on feedback from the U.S. Food and Drug Administration (FDA). The randomized, 1:1 placebo-controlled trial is expected to include approximately 30,000 participants enrolled in the U.S.
    07/05/2020 - 09:38