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An Observational Study of Moderna COVID-19 Bivalent Vaccines (Original and Omicron BA.4/BA.5) and 2023 Updated mRNA COVID-19 Vaccines (XBB.1.5)

DisCOVEries 2 - An Observational Study to Evaluate the Immunogenicity of mRNA COVID-19 Bivalent Vaccines (Original and Omicron BA.4/BA.5) and 2023 Updated mRNA COVID-19 Vaccines (XBB.1.5)

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT05765578
Enrollment
1713
Registered
2023-03-13
Start date
2023-03-08
Completion date
2024-06-17
Last updated
2024-07-31

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

COVID-19

Keywords

Immunogenicity, Moderna, mRNA-1273, Omicron, Vaccines

Brief summary

The goal of this observational study is to analyze binding antibody levels in adults in the United States (US) after receiving coronavirus disease 2019 (COVID-19) bivalent boosters (original and omicron BA.4/5) and updated COVID-19 vaccines (XBB.1.5).

Interventions

Sterile liquid for injection. Intervention not administered through this study.

BIOLOGICALModerna mRNA1273.222 Booster

Sterile liquid for injection. Intervention not administered through this study.

BIOLOGICALPfizer COVID-19 Vaccine

Sterile liquid for injection. Intervention not administered through this study.

BIOLOGICALModerna 2023 Updated COVID-19 vaccine (XBB.1.5)

Sterile liquid for injection. Intervention not administered through this study.

BIOLOGICALPfizer 2023 Updated COVID-19 vaccine (XBB.1.5)

Sterile liquid for injection. Intervention not administered through this study.

Sponsors

ModernaTX, Inc.
Lead SponsorINDUSTRY

Study design

Observational model
COHORT
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* Lives in the continental United States (US). * Speaks, reads, and understands English. * Is willing and able to submit vaccination card photo(s) or vaccination records. * Is willing and able to self-collect capillary blood during the study period via an at-home whole-blood collection device. * Is fully vaccinated against COVID-19 per protocol specified criteria.

Exclusion criteria

* Has been diagnosed with significant cognitive impairment or dementia. * Is pregnant or planning to become pregnant during the study period. * Primary mailing address is a Post Office box, Army Post Office, Fleet Post Office, or Diplomatic Post Office address. * Currently lives in a US military base located overseas, or US territories (Puerto Rico, US Virgin Islands, Guam, Northern Mariana Island, or American Samoa). * Is currently participating in a COVID-19 vaccine clinical trial. * Is currently receiving chemotherapy or has received chemotherapy in the past 6 months. * Is currently taking steroids, such as prednisone, for any condition. * Has been diagnosed with and taking immunosuppressants for rheumatoid arthritis, lupus or multiple sclerosis. * Has received an organ transplant. * Is currently undergoing dialysis of any kind (for example, hemodialysis or chronic ambulatory dialysis) for kidney disease.

Design outcomes

Primary

MeasureTime frame
GMR of GMT of Serum SARS-CoV-2 Binding Antibody Concentrations Against Omicron XBB.1 at Day 181 Between Moderna 2023 Updated COVID-19 vaccine (XBB.1.5) and Pfizer 2023 Updated COVID-19 vaccine (XBB.1.5)Day 181
Geometric Mean Ratio (GMR) of GMT of Serum SARS-CoV-2 Binding Antibody Concentrations Against Omicron XBB.1 at Day 29 Between Moderna 2023 Updated COVID-19 vaccine (XBB.1.5) and Pfizer 2023 Updated COVID-19 vaccine (XBB.1.5)Day 29
GMR of GMT of Serum SARS-CoV-2 Binding Antibody Concentrations Against Omicron XBB.1 at Day 91 Between Moderna 2023 Updated COVID-19 vaccine (XBB.1.5) and Pfizer 2023 Updated COVID-19 vaccine (XBB.1.5)Day 91
Geometric Mean Titer (GMT) of Serum Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Binding Antibody Titers Against Omicron BA.4/5 at Day 29 Between MMMM Group and PPPP GroupDay 29
GMT of SARS-CoV-2 Binding Antibody Titers Against Omicron BA.4/5 at Day 91 Between MMMM Group and PPPP GroupDay 91
GMT of SARS-CoV-2 Binding Antibody Titers Against Omicron BA.4/5 at Day 181 Between MMMM Group and PPPP GroupDay 181

Secondary

MeasureTime frame
GMR of GMT Against All Other Omicron Variants and Subvariants Between Moderna 2023 Updated COVID-19 vaccine (XBB.1.5) and Pfizer 2023 Updated COVID-19 vaccine (XBB.1.5)Day 29, Day 91, and Day 181
GMT Against All Other Omicron Variants and Subvariants Between MMMM Group and PPPP GroupDay 29, Day 91, and Day 181

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026