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Study of a Novel Tetravalent Dengue Vaccine in Healthy Children Aged 2 to 14 Years in Asia

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. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT01373281
Recruitment Status : Completed
First Posted : June 14, 2011
Results First Posted : November 16, 2015
Last Update Posted : March 21, 2022
Sponsor:
Information provided by (Responsible Party):
Sanofi ( Sanofi Pasteur, a Sanofi Company )

Brief Summary:

The aim of the trial was to assess the efficacy of the CYD dengue vaccine in preventing symptomatic, virologically-confirmed dengue (VCD) cases.

Primary Objective:

To assess the efficacy of CYD dengue vaccine after 3 vaccinations at 0, 6, and 12 months in preventing symptomatic VCD cases, regardless of the severity, due to any of the four serotypes in children aged 2 to 14 years at the time of inclusion.

Secondary Objectives:

  • To describe the efficacy of CYD dengue vaccine in preventing symptomatic VCD cases after the third dose to the end of the Active Phase, after at least 1 dose, and after 2 doses.
  • To describe the occurrence of serious adverse events (SAEs), including SAEs of special interest in all participants throughout the trial period.
  • To describe the occurrence of hospitalized virologically-confirmed dengue (VCD) cases and the occurrence of severe (clinically-severe or as per World Health Organization (WHO) criteria) VCD cases, throughout the Surveillance Expansion period (SEP) and throughout the trial (from Day 0 to the end of the study).
  • To describe the antibody response to each dengue serotype after Dose 2, after Dose 3, and 1 and 5 years after Dose 3.

Condition or disease Intervention/treatment Phase
Dengue Dengue Fever Dengue Hemorrhagic Fever Biological: Live, attenuated, dengue serotype 1, 2, 3, 4 virus Biological: Placebo: Sodium chloride (NaCl) 0.9% Phase 3

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 10275 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: Efficacy and Safety of a Novel Tetravalent Dengue Vaccine in Healthy Children Aged 2 to 14 Years in Asia
Actual Study Start Date : June 3, 2011
Actual Primary Completion Date : August 1, 2014
Actual Study Completion Date : November 21, 2017

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Dengue Vaccines

Arm Intervention/treatment
Experimental: Dengue Vaccine Group
Participants were to receive CYD dengue vaccine at 0, 6, and 12 months.
Biological: Live, attenuated, dengue serotype 1, 2, 3, 4 virus
0.5 mL, Subcutaneous
Other Name: CYD Dengue Vaccine

Placebo Comparator: Control Group
Participants were to receive a placebo vaccine at 0, 6, and 12 months.
Biological: Placebo: Sodium chloride (NaCl) 0.9%
0.5 mL, Subcutaneous




Primary Outcome Measures :
  1. Number of Symptomatic Virologically Confirmed Dengue (VCD) Cases Due to Any Serotype During the Active Phase Post-dose 3 Following Injection (Inj.) With Either CYD Dengue Vaccine or a Placebo [ Time Frame: 28 days and up to 13 months post-dose 3 ]
    Symptomatic VCD cases were defined as occurrence of acute febrile illness (temperature >=38°C on at least 2 consecutive days) and confirmation of dengue virus infection by dengue reverse transcriptase polymerase chain reaction and/or dengue NS protein 1 antigen enzyme-linked immunosorbent assay. Vaccine efficacy was defined as 1 minus the ratio of density incidence due to any serotype after at least 1 dose in the CYD Dengue Vaccine Group over the density incidence of the Placebo Vaccine Group.


Secondary Outcome Measures :
  1. Geometric Mean Titers of Antibodies Against Each Serotype With the Parental Dengue Virus Strain Before and Following Injection With Either CYD Dengue Tetravalent Vaccine or a Placebo [ Time Frame: Pre-injection 1, 28 days post Injections 2 and 3, 13 months (Visit 07) and 60 months (Visit 12) post-injection 3 ]
    Geometric mean titers against each of the 4 serotypes of dengue virus strains were assessed using the plaque reduction neutralization test (PRNT) in a pre-defined subset of participants.

  2. Percentage of Participants With Antibody Titers >= 10 1/Dilution (1/Dil) Against Each Dengue Virus Serotype Strain Before and Following Inj. With CYD Dengue Vaccine or Placebo [ Time Frame: Pre-injection 1, 28 days post Injections 2 and 3, 13 months (V 07) and 60 months (V 12) post-injection 3 ]
    Percentage of participants with antibody titers >= 10 (1/Dil) against each serotypes of the dengue virus strains were assessed using PRNT in a pre-defined subset of participants.

  3. Number of Symptomatic VCD Cases Due to Any Serotype Occurring 28 Days Post-dose 1 Following Injection With Either CYD Dengue Vaccine or a Placebo [ Time Frame: 28 days post-injection 1 and up to 13 months post-injection 3 ]
    Symptomatic VCD cases were defined as occurrence of acute febrile illness (temperature >= 38°C on at least 2 consecutive days) and confirmation of dengue virus infection by dengue reverse transcriptase polymerase chain reaction and/or dengue NS1 enzyme-linked immunosorbent assay. Vaccine efficacy was defined as 1 minus the ratio of density incidence due to any serotype after at least 1 dose in the CYD Dengue Vaccine Group over the density incidence of the Placebo Vaccine Group.

  4. Number of Symptomatic VCD Cases Due to Any Serotype 28 Days Post-dose 2 Following Injection With Either CYD Dengue Vaccine or a Placebo [ Time Frame: 28 days post-injection 2 and up to 13 months post-injection 3 ]
    Symptomatic VCD cases were defined as occurrence of acute febrile illness (temperature >= 38°C on at least 2 consecutive days) and confirmation of dengue virus infection by dengue reverse transcriptase polymerase chain reaction and/or dengue NS1 enzyme-linked immunosorbent assay. Vaccine efficacy was defined as 1 minus the ratio of density incidence due to any serotype after at least 1 dose in the CYD Dengue Vaccine Group over the density incidence of the Placebo Vaccine Group.

  5. Number of Symptomatic VCD Cases Due to Any Serotype During the Active Phase in Either CYD Dengue Vaccine or Placebo Group [ Time Frame: Day 0 up to 13 months post-injection 3 ]
    Symptomatic VCD cases were defined as occurrence of acute febrile illness (temperature >=38°C on at least 2 consecutive days) and confirmation of dengue virus infection by dengue reverse transcriptase polymerase chain reaction and/or dengue NS1 enzyme-linked immunosorbent assay. Vaccine efficacy was defined as 1 minus the ratio of density incidence due to any serotype after at least 1 dose in the CYD Dengue Vaccine Group over the density incidence of the Placebo Vaccine Group.

  6. Number of Symptomatic VCD Cases Meeting 1997 WHO Criteria Throughout the Trial Due to Any Serotype Following Injection With Either CYD Dengue Vaccine or a Placebo [ Time Frame: Day 0 to the end of study (up to 72 months) ]

    Dengue hemorrhagic fever cases were defined as number of participants with at least one symptomatic VCD episode meeting the 1997 WHO criteria.

    (a) Fever: acute onset, high (>= 38°C) and continuous, lasting 2 to 7 days and (b) any of the pre-listed hemorrhagic manifestations and laboratory findings of thrombocytopenia (platelet <=100 x 109/L) and plasma leakage as shown by hemoconcentation (hematocrit increased by 20% or more) or pleural effusion (seen on CXR) and/or ascites and/or hypoaluminemia. The first two clinical criteria plus thrombocytopenia and signs of plasma leakage are enough to establish a clinical diagnosis of DHF. Dengue hemorrhagic fever was graded as follows: Grade I: Fever accompanied by non-specific constitutional symptoms; the only hemorrhagic manifestation is a positive tourniquet test; Grade II: Spontaneous bleeding in addition to the manifestations of Grade I participants, usually in the form of skin and/or other hemorrhage.


  7. Number of Symptomatic VCD Cases Meeting 1997 WHO Criteria During the Surveillance Expansion Period Due to Any Serotype Following Inj. With Either CYD Dengue Vaccine or a Placebo [ Time Frame: From consent to participate int the Surveillance Expansion Period to 60 months post-injection 3 (up to Month 72) ]
    The 1997 WHO criteria are: a) Fever: acute onset, high (>= 38°C) and continuous, for 2 to 7 days and (b) any of the following: thrombocytopenia (platelet <=100 x 109/L) and plasma leakage as shown by hematocrit increased by 20% or more or pleural effusion and/or ascites and/or hypoaluminemia. The first two clinical criteria plus thrombocytopenia and signs of plasma leakage are enough to establish diagnosis of DHF. Dengue hemorrhagic fever was graded as follows:Grade I: Fever accompanied by non-specific constitutional symptoms; the only hemorrhagic manifestation is a positive tourniquet test; Grade II: Spontaneous bleeding in addition to the manifestations of Grade I participant,usually in the form of skin and/or other hemorrhages; Grade III: Circulatory failure manifested by rapid and weak pulse, narrowing of pulse pressure (20 mmHg or less) or hypotension, with the presence of cold clammy skin and restlessness; and Grade IV: Profound shock with undetectable blood pressure and pulse.

  8. Number of Clinically Severe VCD Cases Throughout the Trial Due to Any Serotype Following Inj. With Either CYD Dengue Vaccine or a Placebo [ Time Frame: Day 0 to the end of study (up to 72 months) ]
    The severity of VCD cases was assessed by an IDMC based on a medical review of cases and any of the following criteria:1) Platelet count <=100000 μl and bleeding (tourniquet, petechiae or any bleeding) plus plasma leakage 2) Shock (pulse pressure <= 20 mmHg in a child, or hypotension [<= 90 mmHg] with tachycardia, weak pulse and poor perfusion) 3) Bleeding requiring blood transfusion 4) Encephalopathy i.e. Unconsciousness or poor conscious state or fitting not attributable to simple febrile convulsion or focal neurological signs. Poor conscious state or unconsciousness must be supported by GCS score 5) Liver impairment (AST >1000 IU/L or PT INR >1.5) excluding other causes of viral hepatitis 6) Impaired kidney function (serum creatinine >= 1.5 mg/dL) 7) Myocarditis, pericarditis or clinical heart failure supported by CXR, echocardiography, ECG or cardiac enzymes.

  9. Number of Clinically Severe VCD Cases During the Surveillance Expansion Period Due to Any Serotype Following Inj. With Either CYD Dengue Vaccine or a Placebo [ Time Frame: From consent to participate in the Surveillance Expansion Period to 60 months post-injection 3 (up to Month 72) ]
    The severity of VCD cases was assessed by an IDMC based on a medical review of cases and any of the following criteria:1) Platelet count <=100000μl and bleeding (tourniquet, petechiae or any bleeding) plus plasma leakage 2) Shock (pulse pressure <= 20mmHg in a child, or hypotension [<= 90 mmHg] with tachycardia, weak pulse and poor perfusion) 3) Bleeding requiring blood transfusion 4) Encephalopathy i.e. Unconsciousness or poor conscious state or fitting not attributable to simple febrile convulsion or focal neurological signs. Poor conscious state or unconsciousness must be supported by GCS score 5) Liver impairment (AST >1000 IU/L or PT INR >1.5) excluding other causes of viral hepatitis 6) Impaired kidney function (serum creatinine >= 1.5 mg/dL) 7) Myocarditis, pericarditis or clinical heart failure supported by CXR, echocardiography, ECG or cardiac enzymes.

  10. Number of Participants With Solicited Injection Site Reactions Following Any and Each Inj. With Either CYD Dengue Vaccine or a Placebo [ Time Frame: Within 7 days after injection ]
    Solicited injection site reactions: Pain, Erythema, and Swelling. Grade 3 reactions (2-11 years): Pain, Incapacitating, unable to perform usual activities; Erythema and Swelling, >= 50 mm. Grade 3 Solicited injection site reactions (12-14 years): Pain, Significant, prevents daily activity; Erythema and Swelling, >100 mm.

  11. Number of Participants With Systemic Reactions Following Any and Each Inj. With Either CYD Dengue Vaccine or a Placebo [ Time Frame: Within 14 days after injection ]
    Solicited systemic reactions: Fever (Temperature), Headache, Malaise, Myalgia, and Asthenia. Grade 3 reactions: Fever, >= 39°C; Headache, Malaise, Myalgia, and Asthenia, Significant, prevents daily activity.

  12. Number of Hospitalized VCD Cases Throughout the Trial Due to Any Serotype Following Injection With Either CYD Dengue Vaccine or a Placebo [ Time Frame: Day 0 to the end of study (up to 72 months) ]
    Hospitalized VCD cases were defined as VCD confirmed by dengue RT-PCR and/or dengue NS1 ELISA in participants with acute febrile illness (temperature >=38°C on at least 2 consecutive days) requiring hospitalization.

  13. Number of Hospitalized VCD Cases During the Surveillance Expansion Period Due to Any Serotype Following Injection With Either CYD Dengue Vaccine or a Placebo [ Time Frame: From consent to participate in the Surveillance Expansion Period to 60 months post-injection 3 (up to Month 72) ]
    Hospitalized VCD cases were defined as VCD confirmed by dengue RT-PCR and/or dengue NS1 ELISA in participants with acute febrile illness (temperature >= 38°C on at least 2 consecutive days) requiring hospitalization.



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Ages Eligible for Study:   2 Years to 14 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Aged 2 to 14 years on the day of inclusion and resident of the site zone
  • Participant was in good health, based on medical history and physical examination
  • Assent form or informed consent form has been signed and dated by the participant (based on local regulations), and informed consent form has been signed and dated by the parent(s) or another legally acceptable representative (and by an independent witness if required by local regulations)
  • Participant attended all scheduled visits and to comply with all trial procedures.

Exclusion Criteria:

  • Participant was pregnant, or lactating, or was of childbearing potential (to be considered of non-childbearing potential, a female must be pre-menarche for at least 1 year, surgically sterile, or using an effective method of contraception or abstinence from at least 4 weeks prior to the first vaccination until at least 4 weeks after the last vaccination)
  • Participation in another clinical trial investigating a vaccine, drug, medical device, or a medical procedure in the 4 weeks preceding the first trial vaccination
  • Planned participation in another clinical trial during the present trial period
  • Self-reported or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy such as anti-cancer chemotherapy or radiation therapy within the preceding 6 months; or long-term systemic corticosteroids therapy (prednisone or equivalent for more than 2 consecutive weeks within the past 3 months)
  • Self-reported seropositivity for Human Immunodeficiency Virus (HIV) infection
  • Self-reported systemic hypersensitivity to any of the vaccine components, or history of a life-threatening reaction to the vaccine used in the trial or to a vaccine containing any of the same substances
  • Chronic illness that, in the opinion of the Investigator, is at a stage where it might interfere with trial conduct or completion
  • Receipt of blood or blood-derived products in the past 3 months, which might interfere with assessment of the immune response
  • Planned receipt of any vaccine in the 4 weeks following any trial vaccination
  • Deprived of freedom by administrative or court order, or in an emergency setting, or hospitalized involuntarily
  • Current alcohol abuse or drug addiction that might interfere with the ability to comply with trial procedures
  • Identified as a site employee of the Investigator or study center, with direct involvement in the proposed study or other studies under the direction of that Investigator or study center, as well as a family member (i.e., immediate, husband, wife and their children, adopted or natural) of the site employees or the Investigator.

Information from the National Library of Medicine

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): NCT01373281


Locations
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Indonesia
Denpasar, Bali, Indonesia, 80114
Bandung, West Java, Indonesia, 40161
Jakarta, Indonesia, 10430
Malaysia
Kuala Lumpur, Malaysia, 50586
Pulau Pinang, Malaysia, 10450
Philippines
Cebu City, Philippines, 6000
San Pablo City, Philippines, 4000
Thailand
Nai Muang, Kamphaeng Phet Province, Thailand, 6200
Ban Pong, Ratchaburi Province, Thailand, 70110
Photharam, Ratchaburi Province, Thailand, 70120
Vietnam
Long Xuyên, An Giang Province, Vietnam
Mỹ Tho, Tien Giang Province, Vietnam
Sponsors and Collaborators
Sanofi Pasteur, a Sanofi Company
Investigators
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Study Director: Medical Director Sanofi Pasteur SA
Publications of Results:

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):

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Responsible Party: Sanofi Pasteur, a Sanofi Company
ClinicalTrials.gov Identifier: NCT01373281    
Other Study ID Numbers: CYD14
UTN: U1111-1116-4957 ( Other Identifier: WHO )
2014-001708-24 ( EudraCT Number )
First Posted: June 14, 2011    Key Record Dates
Results First Posted: November 16, 2015
Last Update Posted: March 21, 2022
Last Verified: March 2022
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes
Plan Description: Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient level data will be anonymized and study documents will be redacted to protect the privacy of trial participants. Further details on Sanofi's data sharing criteria, eligible studies, and process for requesting access can be found at: https://vivli.org
Keywords provided by Sanofi ( Sanofi Pasteur, a Sanofi Company ):
Dengue
Dengue fever
Dengue Hemorrhagic Fever
CYD dengue vaccine
Flavivirus
Additional relevant MeSH terms:
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Dengue
Hemorrhagic Fevers, Viral
Severe Dengue
Fever
Hyperthermia
Body Temperature Changes
Heat Stress Disorders
Wounds and Injuries
Arbovirus Infections
Vector Borne Diseases
Infections
Virus Diseases
Flavivirus Infections
Flaviviridae Infections
RNA Virus Infections
Vaccines
Immunologic Factors
Physiological Effects of Drugs