Moderna Vaccine mRNA-1345 Observational Respiratory Syncytial Virus (RSV) Study
![]() |
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT05572658 |
Recruitment Status :
Recruiting
First Posted : October 10, 2022
Last Update Posted : January 11, 2023
|
- Study Details
- Tabular View
- No Results Posted
- Disclaimer
- How to Read a Study Record
Condition or disease | Intervention/treatment |
---|---|
Respiratory Syncytial Virus | Biological: mRNA-1345 Biological: Placebo |
Study Type : | Observational |
Estimated Enrollment : | 7000 participants |
Observational Model: | Cohort |
Time Perspective: | Prospective |
Official Title: | mRNA-1345-P901 Study: RSV Outcomes Study Extension (ROSE) |
Actual Study Start Date : | September 15, 2022 |
Estimated Primary Completion Date : | June 30, 2024 |
Estimated Study Completion Date : | June 30, 2026 |
Group/Cohort | Intervention/treatment |
---|---|
mRNA-1345: Exposed
Eligible US participants from the mRNA-1345-P301 (P301) study who received the mRNA-1345 vaccine.
|
Biological: mRNA-1345
Sterile liquid for injection |
Placebo/Control: Referent
Eligible US participants from the P301 study who received placebo and eligible US-based, matched, unvaccinated RWD participants.
|
Biological: Placebo
0.9% sodium chloride (normal saline) injection |
- Incidence Rate of Hospitalizations for All-cause, Cardiopulmonary/Cardiovascular, Pneumonia/Influenza, or RSV [ Time Frame: From Day 15 up to 1, 2, or 3 years ]
- Death Rate Within 30 Days, 31-365 Days, and up to 3 Years After mRNA-1345 Exposure [ Time Frame: From Day 15 to Day 30, 31-365, and up to 3 years ]
- Incidence Rate of Discharge to Long-term or Short-term Institutional Care Following Hospitalization for All-cause, Cardiopulmonary/Cardiovascular, Pneumonia/Influenza, or RSV [ Time Frame: From Day 15 up to 1, 2, or 3 years ]
- Length of Stay of Hospitalizations for All-cause, Cardiopulmonary/Cardiovascular, Pneumonia/Influenza, Or RSV [ Time Frame: From Day 15 up to 3 years ]
- Length of Stay of Hospitalizations Related to All-Causes, Cardiopulmonary/Cardiovascular, Pneumonia/Influenza, or RSV [ Time Frame: Up to 1 year ]
- Mean Total Cost of Hospitalizations Related to All-Causes, Cardiopulmonary/Cardiovascular, Pneumonia/Influenza, or RSV [ Time Frame: Up to 1 Year ]

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 60 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | Yes |
Sampling Method: | Probability Sample |
Inclusion Criteria:
P901 inclusion criteria:
- RWD-matched unvaccinated
- Must be a participant in P301
- Must be based in the US
- Must provide informed consent for P901
P301 key inclusion criteria:
- Adults who are primarily responsible for self-care and activities of daily living.
- Participants may have one or more chronic medical diagnoses (specifically chronic heart failure and chronic obstructive pulmonary disease) but should be medically stable in the opinion of the investigator.
- Body mass index from ≥18 kilograms (kg)/square meter (m^2) to ≤35 kg/m^2.
Exclusion Criteria:
P901 exclusion criteria:
- Receipt of any future licensed RSV vaccine at baseline.
- Receipt of any future licensed RSV vaccines during the study follow-up period will result in censorship on the date the vaccine was received.
All inclusion and exclusion criteria from P301 that are available in the RWD will be applied to the enriched RWD control population.
P301 key exclusion criteria:
- Participation in another clinical research study where participant has received an investigational product (drug/biologic/device) within 45 days before the planned date of the Day 1 vaccination.
- Prior participation in research involving receipt of any investigational RSV product (drug/biologic/device).
- History of a serious reaction to any prior vaccination or Guillain-Barré syndrome within 6 weeks of any prior influenza immunization.
- Received or plans to receive any non-study vaccine within 28 days before or after the Day 1 study injection. The exceptions are seasonal influenza vaccines, pneumococcal vaccines, or authorized or approved vaccines for the prevention of COVID-19 (regardless of type of vaccine), which are not permitted within 14 days before or after the Day 1 study injection. Efforts should be made to space study injection and COVID-19 vaccination by at least 7 and preferably 14 days, but COVID-19 vaccination should not be delayed.
Other inclusion and/or exclusion criteria may apply.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT05572658
Contact: Moderna Clinical Trials Support Center | 1-877-777-7187 | clinicaltrials@modernatx.com |

Responsible Party: | ModernaTX, Inc. |
ClinicalTrials.gov Identifier: | NCT05572658 |
Other Study ID Numbers: |
mRNA-1345-P901 |
First Posted: | October 10, 2022 Key Record Dates |
Last Update Posted: | January 11, 2023 |
Last Verified: | January 2023 |
Viral Diseases Messenger RNA Moderna |
mRNA-1345 Effectiveness Vaccines |