Last reviewed · How we verify

NCT04449276

A Study to Evaluate the Safety, Reactogenicity and Immunogenicity of Vaccine CVnCoV in Healthy Adults for COVID-19

Completed Phase 1 Results posted Last updated 30 January 2023
What this trial tests

Phase 1 trial testing CVnCoV Vaccine in Severe Acute Respiratory Syndrome in 280 participants. Completed in 21 December 2021.

Timeline
18 June 2020
Primary endpoint
21 December 2021
21 December 2021

Quick facts

Lead sponsorCureVac
PhasePhase 1
StatusCompleted
Study typeINTERVENTIONAL
Allocationrandomized
Designsequential
Maskingsingle
Primary purposeprevention
Enrollment280
Start date18 June 2020
Primary completion21 December 2021
Estimated completion21 December 2021
Sites4 locations across Belgium, Germany

Drugs / interventions tested

Conditions studied

Sponsor

CureVac — full company profile →

Who can join

Adults 18 to 60, any sex, with Severe Acute Respiratory Syndrome or Coronavirus. 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.

Number of Participants With Grade 3 Adverse Reactions or Any Serious Adverse Event (SAE) Considered Related to Trial Vaccine Within at Least 24 Hours After the First Vaccination Primary · Up to 24 hours after vaccination on Day 1

Grade 3 refers to the highest grading on the FDA toxicity scale where a higher grade indicates a worse outcome. An SAE was defined as any untoward medical occurrence that, at any dose: * Resulted in death. * Was life-threatening. * Required inpatient hospitalization or prolongation of existing hospitalization. * Resulted in persistent disability/incapacity. * Was a congenital anomaly/birth defect in the offspring of the participant. * Was an important medical event.

Any Grade 3 Adverse Reaction
GroupValue95% CI
Dose Escalation CVnCoV: 2 µg3
Dose Escalation CVnCoV: 4 µg9
Dose Escalation CVnCoV: 6 µg8
Dose Escalation CVnCoV: 8 µg14
Dose Escalation CVnCoV: 12 µg12
Dose Escalation CVnCoV: 16 µg7
Dose Escalation CVnCoV: 20 µg8
Dose Escalation Placebo0
Any Serious Adverse Event (SAE) Considered Related to Trial Vaccine
GroupValue95% CI
Dose Escalation CVnCoV: 2 µg0
Dose Escalation CVnCoV: 4 µg0
Dose Escalation CVnCoV: 6 µg0
Dose Escalation CVnCoV: 8 µg0
Dose Escalation CVnCoV: 12 µg0
Dose Escalation CVnCoV: 16 µg0
Dose Escalation CVnCoV: 20 µg0
Dose Escalation Placebo0
Number of Participants With Grade 3 Adverse Reactions or Any Serious Adverse Event (SAE) Considered Related to Trial Vaccine Within at Least 60 Hours After the First Vaccination Primary · Up to 60 hours after vaccination on Day 1

Grade 3 refers to the highest grading on the FDA toxicity scale where a higher grade indicates a worse outcome. An SAE was defined as any untoward medical occurrence that, at any dose: * Resulted in death. * Was life-threatening. * Required inpatient hospitalization or prolongation of existing hospitalization. * Resulted in persistent disability/incapacity. * Was a congenital anomaly/birth defect in the offspring of the participant. * Was an important medical event.

Any Grade 3 Adverse Reaction
GroupValue95% CI
Dose Escalation CVnCoV: 2 µg3
Dose Escalation CVnCoV: 4 µg9
Dose Escalation CVnCoV: 6 µg8
Dose Escalation CVnCoV: 8 µg14
Dose Escalation CVnCoV: 12 µg12
Dose Escalation CVnCoV: 16 µg7
Dose Escalation CVnCoV: 20 µg8
Dose Escalation Placebo0
Any Serious Adverse Event (SAE) Considered Related to Trial Vaccine
GroupValue95% CI
Dose Escalation CVnCoV: 2 µg0
Dose Escalation CVnCoV: 4 µg0
Dose Escalation CVnCoV: 6 µg0
Dose Escalation CVnCoV: 8 µg0
Dose Escalation CVnCoV: 12 µg0
Dose Escalation CVnCoV: 16 µg0
Dose Escalation CVnCoV: 20 µg0
Dose Escalation Placebo0
Number of Participants With Solicited Local Adverse Events Primary · Up to 7 days after vaccination (Days 1 to 8 and Day 29 to 36)

Reactogenicity was assessed daily via collection of solicited local AEs (injection site pain, redness, swelling, and itching) using paper diary cards.

GroupValue95% CI
Dose Escalation CVnCoV: 2 µg32
Dose Escalation CVnCoV: 4 µg43
Dose Escalation CVnCoV: 6 µg38
Dose Escalation CVnCoV: 8 µg41
Dose Escalation CVnCoV: 12 µg26
Dose Escalation CVnCoV: 16 µg16
Dose Escalation CVnCoV: 20 µg11
Dose Escalation Placebo5
Intensity of Solicited Local Adverse Events Per the FDA Toxicity Grading Scale Primary · Up to 7 days after vaccination (Days 1 to 8 and Days 29 to 36)

Reactogenicity was assessed daily via collection of solicited local AEs (injection site pain, redness, swelling, and itching) using paper diary cards. Intensity of solicited local AEs and solicited systemic AEs were graded per the FDA Toxicity Grading Scale at Grades 1-3, where higher grades indicate a worse outcome.

Grade 1
GroupValue95% CI
Dose Escalation CVnCoV: 2 µg30
Dose Escalation CVnCoV: 4 µg39
Dose Escalation CVnCoV: 6 µg32
Dose Escalation CVnCoV: 8 µg29
Dose Escalation CVnCoV: 12 µg17
Dose Escalation CVnCoV: 16 µg12
Dose Escalation CVnCoV: 20 µg6
Dose Escalation Placebo5
Grade 2
GroupValue95% CI
Dose Escalation CVnCoV: 2 µg2
Dose Escalation CVnCoV: 4 µg3
Dose Escalation CVnCoV: 6 µg5
Dose Escalation CVnCoV: 8 µg11
Dose Escalation CVnCoV: 12 µg9
Dose Escalation CVnCoV: 16 µg4
Dose Escalation CVnCoV: 20 µg5
Dose Escalation Placebo0
Grade 3
GroupValue95% CI
Dose Escalation CVnCoV: 2 µg0
Dose Escalation CVnCoV: 4 µg1
Dose Escalation CVnCoV: 6 µg1
Dose Escalation CVnCoV: 8 µg1
Dose Escalation CVnCoV: 12 µg0
Dose Escalation CVnCoV: 16 µg0
Dose Escalation CVnCoV: 20 µg0
Dose Escalation Placebo0
Duration of Solicited Local Adverse Events Primary · Up to 7 days after vaccination (Days 1 to 8 and Days 29 to 36)

Reactogenicity was assessed daily via collection of solicited local AEs (injection site pain, redness, swelling, and itching) using paper diary cards. Duration was calculated as consecutive days with a respective solicited AE regardless of the grade of the AE.

GroupValue95% CI
Dose Escalation CVnCoV: 2 µg1.8± 0.99
Dose Escalation CVnCoV: 4 µg2.0± 0.84
Dose Escalation CVnCoV: 6 µg2.3± 1.02
Dose Escalation CVnCoV: 8 µg2.4± 1.44
Dose Escalation CVnCoV: 12 µg2.6± 1.44
Dose Escalation CVnCoV: 16 µg2.5± 0.82
Dose Escalation CVnCoV: 20 µg3.0± 1.18
Dose Escalation Placebo1.2± 0.45
Number of Participants With Solicited Systemic Adverse Events Primary · Up to 7 days after vaccination (Days 1 to 8 and Days 29 to 36)

Reactogenicity was assessed daily via collection of solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) using paper diary cards.

GroupValue95% CI
Dose Escalation CVnCoV: 2 µg29
Dose Escalation CVnCoV: 4 µg45
Dose Escalation CVnCoV: 6 µg44
Dose Escalation CVnCoV: 8 µg45
Dose Escalation CVnCoV: 12 µg28
Dose Escalation CVnCoV: 16 µg16
Dose Escalation CVnCoV: 20 µg12
Dose Escalation Placebo19
Intensity of Solicited Systemic Adverse Events Per the FDA Toxicity Grading Scale Primary · Up to 7 days after vaccination (Days 1 to 8 and Days 29 to 36)

Reactogenicity was assessed daily via collection of solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) using paper diary cards. Intensity of solicited local AEs and solicited systemic AEs were graded per the FDA Toxicity Grading Scale at Grades 1-3, where higher grades indicate a worse outcome.

Grade 1
GroupValue95% CI
Dose Escalation CVnCoV: 2 µg21
Dose Escalation CVnCoV: 4 µg22
Dose Escalation CVnCoV: 6 µg20
Dose Escalation CVnCoV: 8 µg11
Dose Escalation CVnCoV: 12 µg1
Dose Escalation CVnCoV: 16 µg2
Dose Escalation CVnCoV: 20 µg0
Dose Escalation Placebo15
Grade 2
GroupValue95% CI
Dose Escalation CVnCoV: 2 µg5
Dose Escalation CVnCoV: 4 µg14
Dose Escalation CVnCoV: 6 µg16
Dose Escalation CVnCoV: 8 µg20
Dose Escalation CVnCoV: 12 µg16
Dose Escalation CVnCoV: 16 µg7
Dose Escalation CVnCoV: 20 µg5
Dose Escalation Placebo4
Grade 3
GroupValue95% CI
Dose Escalation CVnCoV: 2 µg3
Dose Escalation CVnCoV: 4 µg9
Dose Escalation CVnCoV: 6 µg8
Dose Escalation CVnCoV: 8 µg14
Dose Escalation CVnCoV: 12 µg11
Dose Escalation CVnCoV: 16 µg7
Dose Escalation CVnCoV: 20 µg7
Dose Escalation Placebo0
Duration of Solicited Systemic Adverse Events Primary · Up to 7 days after vaccination (Days 1 to 8 and Days 29 to 36)

Reactogenicity was assessed daily via collection of solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) using paper diary cards. Duration was calculated as consecutive days with a respective solicited AE regardless of the grade of the AE.

GroupValue95% CI
Dose Escalation CVnCoV: 2 µg3.1± 5.38
Dose Escalation CVnCoV: 4 µg2.1± 1.15
Dose Escalation CVnCoV: 6 µg2.4± 2.16
Dose Escalation CVnCoV: 8 µg3.2± 2.40
Dose Escalation CVnCoV: 12 µg3.6± 1.73
Dose Escalation CVnCoV: 16 µg2.5± 0.73
Dose Escalation CVnCoV: 20 µg3.4± 1.24
Dose Escalation Placebo1.8± 0.96
Number of Participants With Solicited Systemic Adverse Events Considered Related to Trial Vaccine Primary · Up to 7 days after vaccination (Days 1 to 8 and Days 29 to 36)

Reactogenicity was assessed daily via collection of solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) using paper diary cards. The Investigator assessed the relationship between trial vaccine and each occurrence of each AE.

GroupValue95% CI
Dose Escalation CVnCoV: 2 µg28
Dose Escalation CVnCoV: 4 µg45
Dose Escalation CVnCoV: 6 µg44
Dose Escalation CVnCoV: 8 µg44
Dose Escalation CVnCoV: 12 µg28
Dose Escalation CVnCoV: 16 µg16
Dose Escalation CVnCoV: 20 µg12
Dose Escalation Placebo17
Number of Participants With Unsolicited Adverse Events Primary · Up to 28 days after vaccination (Days 1 to 29 and Days 29 to 57)

Diaries were used for collection of unsolicited AEs on each vaccination day and the following 28 days. In addition, participants were contacted by phone to verify whether they had any health concerns since the last visit.

GroupValue95% CI
Dose Escalation CVnCoV: 2 µg26
Dose Escalation CVnCoV: 4 µg32
Dose Escalation CVnCoV: 6 µg29
Dose Escalation CVnCoV: 8 µg31
Dose Escalation CVnCoV: 12 µg23
Dose Escalation CVnCoV: 16 µg13
Dose Escalation CVnCoV: 20 µg11
Dose Escalation Placebo16
Intensity of Unsolicited Adverse Events Assessed by the Investigator Primary · Up to 28 days after vaccination (Days 1 to 29 and Days 29 to 57)

Diaries were used for collection of unsolicited AEs on each vaccination day and the following 28 days. In addition, participants were contacted by phone to verify whether they had any health concerns since the last visit. Participants were included only once, at the maximum severity. The Investigator made an assessment of intensity for each AE reported during the trial and assigned it to one of the following categories: * Mild: an event that was easily tolerated by the participant, causing minimal discomfort and not interfering with everyday activities. * Moderate: an event that caused suffic

Mild
GroupValue95% CI
Dose Escalation CVnCoV: 2 µg14
Dose Escalation CVnCoV: 4 µg17
Dose Escalation CVnCoV: 6 µg15
Dose Escalation CVnCoV: 8 µg12
Dose Escalation CVnCoV: 12 µg9
Dose Escalation CVnCoV: 16 µg8
Dose Escalation CVnCoV: 20 µg4
Dose Escalation Placebo9
Moderate
GroupValue95% CI
Dose Escalation CVnCoV: 2 µg10
Dose Escalation CVnCoV: 4 µg13
Dose Escalation CVnCoV: 6 µg10
Dose Escalation CVnCoV: 8 µg17
Dose Escalation CVnCoV: 12 µg10
Dose Escalation CVnCoV: 16 µg5
Dose Escalation CVnCoV: 20 µg2
Dose Escalation Placebo6
Severe
GroupValue95% CI
Dose Escalation CVnCoV: 2 µg2
Dose Escalation CVnCoV: 4 µg2
Dose Escalation CVnCoV: 6 µg4
Dose Escalation CVnCoV: 8 µg2
Dose Escalation CVnCoV: 12 µg4
Dose Escalation CVnCoV: 16 µg0
Dose Escalation CVnCoV: 20 µg5
Dose Escalation Placebo1
Number of Participants With Unsolicited Adverse Events Considered Related to Trial Vaccine Primary · Up to 28 days after vaccination (Days 1 to 29 and Days 29 to 57)

Diaries were used for collection of unsolicited AEs on each vaccination day and the following 28 days. In addition, participants were contacted by phone to verify whether they had any health concerns since the last visit. The Investigator assessed the relationship between trial vaccine and each occurrence of each AE.

GroupValue95% CI
Dose Escalation CVnCoV: 2 µg7
Dose Escalation CVnCoV: 4 µg20
Dose Escalation CVnCoV: 6 µg15
Dose Escalation CVnCoV: 8 µg16
Dose Escalation CVnCoV: 12 µg12
Dose Escalation CVnCoV: 16 µg4
Dose Escalation CVnCoV: 20 µg10
Dose Escalation Placebo5

Adverse events — posted to ClinicalTrials.gov

Time frame: Day 1 up to Day 393. Reporting threshold: 5%. Adverse-event reports describe events observed during the trial — not all are caused by the drug.

Dose Escalation CVnCoV: 2 µg
Serious: 2/47 (4%)
Deaths: 0/47
Dose Escalation CVnCoV: 4 µg
Serious: 0/48 (0%)
Deaths: 0/48
Dose Escalation CVnCoV: 6 µg
Serious: 1/48 (2%)
Deaths: 0/48
Dose Escalation CVnCoV: 8 µg
Serious: 1/49 (2%)
Deaths: 0/49
Dose Escalation CVnCoV: 12 µg
Serious: 2/28 (7%)
Deaths: 0/28
Dose Escalation CVnCoV: 16 µg
Serious: 0/16 (0%)
Deaths: 0/16
Dose Escalation CVnCoV: 20 µg
Serious: 0/12 (0%)
Deaths: 0/12
Dose Escalation Placebo
Serious: 1/32 (3%)
Deaths: 0/32

Serious adverse events (8 terms)

ReactionSystemDose Escalation CVnCoV: 2 µgDose Escalation CVnCoV: 4 µgDose Escalation CVnCoV: 6 µgDose Escalation CVnCoV: 8 µgDose Escalation CVnCoV: 12…Dose Escalation CVnCoV: 16…Dose Escalation CVnCoV: 20…Dose Escalation Placebo
Abdominal painGastrointestinal disorders
Crohn's diseaseGastrointestinal disorders
Peroneal nerve palsyNervous system disorders
SeizureNervous system disorders
Retinal detachmentEye disorders
Retinal disorderEye disorders
COVID-19Infections and infestations
Humerus fractureInjury, poisoning and procedural complications
Other adverse events (62 terms — click to expand)

ReactionSystemDose Escalation CVnCoV: 2 µgDose Escalation CVnCoV: 4 µgDose Escalation CVnCoV: 6 µgDose Escalation CVnCoV: 8 µgDose Escalation CVnCoV: 12…Dose Escalation CVnCoV: 16…Dose Escalation CVnCoV: 20…Dose Escalation Placebo
HeadacheNervous system disorders
DizzinessNervous system disorders
Oropharyngeal painRespiratory, thoracic and mediastinal disorders
CoughRespiratory, thoracic and mediastinal disorders
FatigueGeneral disorders
Feeling hotGeneral disorders
MalaiseGeneral disorders
DiarrhoeaGastrointestinal disorders
Back painMusculoskeletal and connective tissue disorders
LymphopeniaBlood and lymphatic system disorders
TachycardiaCardiac disorders
DysmerorrhoeaReproductive system and breast disorders
NasopharyngitisInfections and infestations
Upper respiratory tract infectionInfections and infestations
Oral HerpesInfections and infestations
COVID-19Infections and infestations
CystitisInfections and infestations
PharyngitisInfections and infestations
Tooth infectionInfections and infestations
GingivitisInfections and infestations
PyrexiaGeneral disorders
RhinorrhoeaRespiratory, thoracic and mediastinal disorders
NauseaGastrointestinal disorders
Neck painMusculoskeletal and connective tissue disorders
Arthropod stingInjury, poisoning and procedural complications
HyperhidrosisSkin and subcutaneous tissue disorders
LymphadenopathyBlood and lymphatic system disorders
LeukopeniaBlood and lymphatic system disorders
Gamma-glutamyltransferase increasedInvestigations
Decreased appetiteMetabolism and nutrition disorders
HypertensionVascular disorders
Hot flushVascular disorders
AsthenopiaEye disorders
VertigoEar and labyrinth disorders
RhinitisInfections and infestations
BronchitisInfections and infestations
EnterobiasisInfections and infestations
Epstein-Barr virus infectionInfections and infestations
Taste disorderNervous system disorders
Morton's neuralgiaNervous system disorders

Most-reported serious reactions: Abdominal pain, Crohn's disease, Peroneal nerve palsy, Seizure, Retinal detachment, Retinal disorder, COVID-19, Humerus fracture.

Data from ClinicalTrials.gov NCT04449276 adverse events section.

Sponsor's own description

This study aims to evaluate the safety and reactogenicity profile after 1 and 2 dose administrations of CVnCoV at different dose levels.

Publications & conference data

8 peer-reviewed publications reference this trial (live from Europe PMC):

  1. mRNA vaccines for infectious diseases: principles, delivery and clinical translation.
    Chaudhary N, Weissman D, Whitehead KA. · · 2021 · cited 1014× · PMID 34433919 · DOI 10.1038/s41573-021-00283-5
  2. Immunological considerations for COVID-19 vaccine strategies.
    Jeyanathan M, Afkhami S, Smaill F, Miller MS, et al · · 2020 · cited 697× · PMID 32887954 · DOI 10.1038/s41577-020-00434-6
  3. SARS-CoV-2 immunity: review and applications to phase 3 vaccine candidates.
    Poland GA, Ovsyannikova IG, Kennedy RB. · · 2020 · cited 463× · PMID 33065034 · DOI 10.1016/s0140-6736(20)32137-1
  4. Self-assembled mRNA vaccines.
    Kim J, Eygeris Y, Gupta M, Sahay G. · · 2021 · cited 371× · PMID 33400957 · DOI 10.1016/j.addr.2020.12.014
  5. Advances in COVID-19 mRNA vaccine development.
    Fang E, Liu X, Li M, Zhang Z, et al · · 2022 · cited 368× · PMID 35322018 · DOI 10.1038/s41392-022-00950-y
  6. mRNA vaccine: a potential therapeutic strategy.
    Wang Y, Zhang Z, Luo J, Han X, et al · · 2021 · cited 286× · PMID 33593376 · DOI 10.1186/s12943-021-01311-z
  7. COVID-19 vaccines: rapid development, implications, challenges and future prospects.
    Kashte S, Gulbake A, El-Amin Iii SF, Gupta A. · · 2021 · cited 240× · PMID 33677814 · DOI 10.1007/s13577-021-00512-4
  8. COVID-19 vaccines: The status and perspectives in delivery points of view.
    Chung JY, Thone MN, Kwon YJ. · · 2021 · cited 240× · PMID 33359141 · DOI 10.1016/j.addr.2020.12.011

Verify or expand the search:

Other trials of CVnCoV Vaccine

Trials testing the same drug.

Other CureVac trials

Trials by the same sponsor.

Verify against primary sources

Data sources for this page

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/NCT04449276.

Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing