18 and older, any sex, with SARS-CoV-2 or COVID-19. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Part A: GMT of Serum Neutralization Titers Against Pseudovirus Bearing SARS-CoV-2 Strain XX Spike ProteinSecondary· At Day 91 and Day 181
Day 91
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
872.5
686.0 – 1109.7
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
1181.9
914.8 – 1527.0
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
1477.7
1160.4 – 1881.8
Part A: CV0601 mRNA COVID-19 Vaccine
1527.8
1196.7 – 1950.4
Part A: Control Vaccine
1155.6
896.6 – 1489.3
Day 181
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
585.0
444.3 – 770.3
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
797.0
600.2 – 1058.5
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
977.6
738.2 – 1294.6
Part A: CV0601 mRNA COVID-19 Vaccine
1032.6
777.1 – 1372.2
Part A: Control Vaccine
734.2
546.9 – 985.7
Part A: GMT of Serum Neutralization Titers Against Pseudovirus Bearing SARS-CoV-2 Strain XY Spike ProteinSecondary· At Day 91 and Day 181
Day 91
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
2637.0
2198.6 – 3162.9
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
3714.0
3058.0 – 4510.8
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
4284.9
3566.3 – 5148.4
Part A: CV0601 mRNA COVID-19 Vaccine
3952.1
3281.3 – 4760.0
Part A: Control Vaccine
3216.5
2656.1 – 3895.1
Day 181
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
2215.8
1779.5 – 2759.0
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
2935.4
2342.8 – 3677.9
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
3319.3
2653.8 – 4151.6
Part A: CV0601 mRNA COVID-19 Vaccine
3243.6
2584.7 – 4070.5
Part A: Control Vaccine
2640.6
2095.6 – 3327.2
Part A: GMT of Serum Neutralization Titers Against Pseudovirus Bearing SARS-CoV-2 Strain XZ Spike ProteinSecondary· At Day 29, Day 91 and Day 181
Day 29
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
196.0
155.1 – 247.7
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
281.5
220.6 – 359.3
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
335.0
262.4 – 427.6
Part A: CV0601 mRNA COVID-19 Vaccine
404.3
316.8 – 515.9
Part A: Control Vaccine
265.7
209.2 – 337.5
Day 91
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
139.8
108.1 – 180.9
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
188.6
142.8 – 249.1
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
259.6
199.3 – 338.2
Part A: CV0601 mRNA COVID-19 Vaccine
259.5
199.6 – 337.2
Part A: Control Vaccine
194.5
148.2 – 255.3
Day 181
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
105.3
78.7 – 140.9
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
131.1
97.3 – 176.7
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
170.2
125.7 – 230.5
Part A: CV0601 mRNA COVID-19 Vaccine
180.2
133.5 – 243.1
Part A: Control Vaccine
117.2
85.9 – 159.7
Part A: Percentage of Participants With Seroresponse of Serum Neutralization Titers Against Pseudovirus Bearing SARS-CoV-2 Strain XX Spike ProteinSecondary· At Day 29 compared to baseline (Day 1)
Seroresponse is defined as post-booster titer greater than or equal to (≥) 4 times the lower limit of quantification (LLOQ) when pre-vaccination titer is below LLOQ or a post-booster titer ≥ 4 times the pre-booster titer when pre-vaccination titer is ≥ LLOQ.
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
38.5
27.66 – 50.17
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
50.0
38.14 – 61.86
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
50.7
38.86 – 62.42
Part A: CV0601 mRNA COVID-19 Vaccine
51.4
39.44 – 63.15
Part A: Control Vaccine
48.1
36.71 – 59.64
Part A: Percentage of Participants With Seroresponse of Serum Neutralization Titers Against Pseudovirus Bearing SARS-CoV-2 Strain XY Spike ProteinSecondary· At Day 29 compared to baseline (Day 1)
Seroresponse is defined as post-booster titer ≥ 4 times the lower limit of quantification (LLOQ) when pre-vaccination titer is below LLOQ or a post-booster titer ≥ 4 times the pre-booster titer when pre-vaccination titer is ≥ LLOQ.
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
17.9
10.17 – 28.28
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
25.7
16.22 – 37.16
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
29.3
19.38 – 40.98
Part A: CV0601 mRNA COVID-19 Vaccine
25.7
16.22 – 37.16
Part A: Control Vaccine
35.0
24.67 – 46.48
Part A: Percentage of Participants With Seroresponse of Serum Neutralization Titers Against Pseudovirus Bearing SARS-CoV-2 Strain XZ Spike ProteinSecondary· At Day 29 compared to baseline (Day 1)
Seroresponse is defined as post-booster titer ≥ 4 times the LLOQ when pre-vaccination titer is below LLOQ or a post-booster titer ≥ 4 times the pre-booster titer when pre-vaccination titer is ≥ LLOQ.
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
39.7
28.83 – 51.46
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
43.8
32.24 – 55.95
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
55.4
43.39 – 66.98
Part A: CV0601 mRNA COVID-19 Vaccine
47.3
35.57 – 59.25
Part A: Control Vaccine
47.5
36.21 – 58.98
Part A: Geometric Mean Increase (GMI) of Serum Neutralization Titers Against Pseudovirus Bearing SARS-CoV-2 Strain XX Spike ProteinSecondary· At Day 29, Day 91 and Day 181 compared to baseline (Day 1)
GMI is defined as the the geometric mean of the within participant ratios of the post-dose titer over the pre-dose titer.
Day 29
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
2.72
2.17 – 3.42
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
3.84
3.03 – 4.87
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
4.56
3.62 – 5.75
Part A: CV0601 mRNA COVID-19 Vaccine
4.77
3.76 – 6.04
Part A: Control Vaccine
3.71
2.94 – 4.68
Day 91
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
1.69
1.33 – 2.15
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
2.29
1.77 – 2.95
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
2.86
2.24 – 3.64
Part A: CV0601 mRNA COVID-19 Vaccine
2.95
2.31 – 3.77
Part A: Control Vaccine
2.23
1.73 – 2.88
Day 181
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
0.96
0.73 – 1.27
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
1.31
0.99 – 1.74
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
1.61
1.21 – 2.13
Part A: CV0601 mRNA COVID-19 Vaccine
1.70
1.28 – 2.26
Part A: Control Vaccine
1.21
0.90 – 1.62
Part A: GMI of Serum Neutralization Titers Against Pseudovirus Bearing SARS-CoV-2 Strain XY Spike ProteinSecondary· At Day 29, Day 91 and Day 181 compared to baseline (Day 1)
GMI is defined as the the geometric mean of the within participant ratios of the post-dose titer over the pre-dose titer.
Day 29
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
2.14
1.79 – 2.55
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
2.68
2.23 – 3.23
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
3.03
2.52 – 3.63
Part A: CV0601 mRNA COVID-19 Vaccine
3.02
2.51 – 3.63
Part A: Control Vaccine
2.79
2.33 – 3.34
Day 91
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
1.41
1.17 – 1.69
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
1.98
1.63 – 2.41
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
2.28
1.90 – 2.75
Part A: CV0601 mRNA COVID-19 Vaccine
2.11
1.75 – 2.54
Part A: Control Vaccine
1.72
1.42 – 2.08
Day 181
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
1.07
0.86 – 1.34
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
1.42
1.14 – 1.78
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
1.61
1.29 – 2.01
Part A: CV0601 mRNA COVID-19 Vaccine
1.57
1.25 – 1.97
Part A: Control Vaccine
1.28
1.02 – 1.61
Part A: GMI of Serum Neutralization Titers Against Pseudovirus Bearing SARS-CoV-2 Strain XZ Spike ProteinSecondary· At Day 29, Day 91 and Day 181 compared to baseline (Day 1)
GMI is defined as the the geometric mean of the within participant ratios of the post-dose titer over the pre-dose titer.
Day 29
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
2.66
2.11 – 3.36
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
3.82
3.00 – 4.88
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
4.55
3.56 – 5.81
Part A: CV0601 mRNA COVID-19 Vaccine
5.49
4.30 – 7.00
Part A: Control Vaccine
3.61
2.84 – 4.58
Day 91
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
1.78
1.37 – 2.30
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
2.40
1.82 – 3.17
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
3.30
2.53 – 4.30
Part A: CV0601 mRNA COVID-19 Vaccine
3.30
2.54 – 4.29
Part A: Control Vaccine
2.47
1.88 – 3.25
Day 181
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
1.16
0.86 – 1.55
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
1.44
1.07 – 1.94
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
1.87
1.38 – 2.53
Part A: CV0601 mRNA COVID-19 Vaccine
1.98
1.47 – 2.67
Part A: Control Vaccine
1.29
0.94 – 1.76
Part A: Geometric Mean Titer (GMT) of Serum Neutralization Titers Against Pseudovirus Bearing SARS-CoV-2 Strain XX Spike ProteinPrimary· At Day 29
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
1266.7
1008.1 – 1591.7
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
1786.9
1409.1 – 2265.9
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
2122.1
1681.9 – 2677.4
Part A: CV0601 mRNA COVID-19 Vaccine
2218.6
1751.4 – 2810.5
Part A: Control Vaccine
1725.5
1367.6 – 2177.0
Part A: GMT of Serum Neutralization Titers Against Pseudovirus Bearing SARS-CoV-2 Strain XY Spike ProteinPrimary· At Day 29
Group
Value
95% CI
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
3725.0
3116.4 – 4452.5
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
4680.6
3886.5 – 5637.0
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
5275.7
4397.6 – 6329.1
Part A: CV0601 mRNA COVID-19 Vaccine
5261.2
4368.3 – 6336.5
Part A: Control Vaccine
4863.4
4058.1 – 5828.5
Part B: GMT of Serum Neutralization Titers Against Pseudovirus Bearing SARS-CoV-2 Strain XY Spike ProteinPrimary· At Day 29
Group
Value
95% CI
Part B: CV0801 mRNA COVID-19 Vaccine (Baseline-control Storage Condition)
5658.8
4762.8 – 6723.4
Part B: CV0801 mRNA COVID-19 Vaccine (Intermediate Storage Condition)
4889.4
4097.4 – 5834.5
Part B: CV0801 mRNA COVID-19 Vaccine (Maximum Storage Condition)
4629.7
3892.7 – 5506.2
Adverse events — posted to ClinicalTrials.gov
Time frame: Part A and Part B: Solicited AEs from Day 1 to Day 7; Unsolicited AEs from Day 1 to Day 28; SAEs, MAAEs and AESIs from Day 1 to Day 181.
Reporting threshold: 0%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
Part A: CV0701 mRNA COVID-19 Vaccine (Low Dose)
Serious: 3/87 (3%)
Deaths: 0/87
Part A: CV0701 mRNA COVID-19 Vaccine (Medium Dose)
Serious: 0/84 (0%)
Deaths: 0/84
Part A: CV0701 mRNA COVID-19 Vaccine (High Dose)
Serious: 3/84 (4%)
Deaths: 0/84
Part A: CV0601 mRNA COVID-19 Vaccine
Serious: 1/85 (1%)
Deaths: 0/85
Part A: Control Vaccine
Serious: 3/85 (4%)
Deaths: 0/85
Part B: CV0801 mRNA COVID-19 Vaccine (Maximum Storage Condition)
Serious: 2/86 (2%)
Deaths: 0/86
Part B: CV0801 mRNA COVID-19 Vaccine (Intermediate Storage Condition)
Serious: 2/87 (2%)
Deaths: 0/87
Part B: CV0801 mRNA COVID-19 Vaccine (Baseline-control Storage Condition)
Serious: 4/88 (5%)
Deaths: 0/88
Serious adverse events (20 terms)
Reaction
System
Part A: CV0701 mRNA COVID-…
Part A: CV0701 mRNA COVID-…
Part A: CV0701 mRNA COVID-…
Part A: CV0601 mRNA COVID-…
Part A: Control Vaccine
Part B: CV0801 mRNA COVID-…
Part B: CV0801 mRNA COVID-…
Part B: CV0801 mRNA COVID-…
Coronary artery disease
Cardiac disorders
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Abdominal pain
Gastrointestinal disorders
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Gastrooesophageal reflux disease
Gastrointestinal disorders
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Biliary colic
Hepatobiliary disorders
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Hepatic cyst
Hepatobiliary disorders
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Abscess limb
Infections and infestations
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Endocarditis
Infections and infestations
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Infective exacerbation of chronic obstructive airways disease
Infections and infestations
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Ophthalmic herpes simplex
Infections and infestations
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Rhinovirus infection
Infections and infestations
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Joint dislocation
Injury, poisoning and procedural complications
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Road traffic accident
Injury, poisoning and procedural complications
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Invasive ductal breast carcinoma
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
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Malignant melanoma in situ
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
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Syncope
Nervous system disorders
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Mixed anxiety and depressive disorder
Psychiatric disorders
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Suicidal ideation
Psychiatric disorders
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Nephrolithiasis
Renal and urinary disorders
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Ureterolithiasis
Renal and urinary disorders
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Endometrial hyperplasia with cellular atypia
Reproductive system and breast disorders
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Other adverse events (128 terms — click to expand)
The purpose of Part A of this study is to assess the immune response and safety of a booster dose of investigational COVID-19 mRNA vaccines in healthy adults. The study will compare the investigational vaccines to control vaccine.
The purpose of Part B of this study is to assess the immune response and safety of a booster dose of investigational COVID-19 mRNA vaccines in healthy adults. The study will compare the investigational vaccine under three different storage conditions.
Publications & conference data
5 peer-reviewed publications reference this trial (live from Europe PMC):
NCT07266558 — A Study to Evaluate the Efficacy and Safety of mRNA-1283 and mRNA-1273 in Participants 50 to 64 Years of Age Without Hig
· Phase 4
· recruiting
NCT06684379 — Study on Safety and Efficacy of Two Doses of PRS CK STORM in the Modulation of the Cytokine Storm for the Treatment of A
· Phase 1, PHASE2
· recruiting
NCT06585241 — A Study to Investigate the Immunogenicity and Safety of mRNA COVID-19 Variant-containing Vaccine Formulations
· Phase 4
· recruiting
NCT05876377 — Use and Effectiveness of COVID-19 Vaccines Using State Vaccine Registries and Insurance Claims Data
· active not recruiting
NCT05799651 — Safety and Immunogenicity of Glycovax-002 Vaccine in Healthy Adults
· Phase 1
· active not recruiting
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Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by GlaxoSmithKline
Last refreshed: 23 October 2025
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT05960097.