NCT06973772

Brief Summary

This randomized, controlled, double blind trial aims at assessing the safety and immunogenicity profiles of the co-administered Live Attenuated Dengue and Chikungunya vaccines comparatively to the isolated administration, in the adult population aged 18 to 59 years without prior exposure to either arbovirus.

Trial Health

63
Monitor

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
900

participants targeted

Target at P75+ for phase_3

Timeline
5mo left

Started Mar 2026

Shorter than P25 for phase_3

Geographic Reach
1 country

7 active sites

Status
not yet recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress20%
Mar 2026Oct 2026

First Submitted

Initial submission to the registry

April 28, 2025

Completed
17 days until next milestone

First Posted

Study publicly available on registry

May 15, 2025

Completed
11 months until next milestone

Study Start

First participant enrolled

March 31, 2026

Completed
3 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

July 1, 2026

Expected
3 months until next milestone

Study Completion

Last participant's last visit for all outcomes

October 1, 2026

Last Updated

March 6, 2026

Status Verified

March 1, 2026

Enrollment Period

3 months

First QC Date

April 28, 2025

Last Update Submit

March 5, 2026

Conditions

Keywords

denguechikungunyacoadministration regimen

Outcome Measures

Primary Outcomes (2)

  • Immunogenicity Primary

    Demonstrate the non-inferiority of the antibody response of co-administered Dengue and Chikungunya vaccines compared to Dengue and Chikungunya vaccines administered separately, for each Dengue serotype and Chikungunya in the adult population aged 18 to 59 years without prior exposure to either arbovirus, by calculating the Geometric Mean Titer (GMT) and the GMT ratio, post-immunization for each dengue serotype and chikungunya, across all intervention groups.

    28 days post-immunization

  • Safety Primary

    Assess the safety profile of co-administered Dengue and Chikungunya vaccines and Dengue and Chikungunya vaccines administered separately, in the adult population aged 18 to 59 years without prior exposure to either arbovirus, through the frequency of participants with solicited (local and systemic) and unsolicited adverse events (AEs), in all intervention groups.

    21 days post-immunization

Secondary Outcomes (5)

  • Immunogenicity Secondary 1

    28 days post-immunization

  • Immunogenicity Secondary 2.

    180 days post-immunization.

  • Safety Secondary 1.

    up to 21 days post-immunization.

  • Safety Secondary 2.

    180 days post-immunization

  • Safety Secondary 3.

    Days 1, 6, 9, 16, and 22.

Study Arms (3)

Dengue and Chikungunya vaccines co-administered

EXPERIMENTAL

A single dose of Butantan-DV + a single dose of VLA1555, administered concomitantly in opposite arms on Day 1.

Biological: DENGUE: Dengue 1,2,3,4 (attenuated) vaccine CHIKUNGUNYA: Chikungunya (CHIKV) live attenuated vaccine (VLA1555)

Dengue vaccine only

EXPERIMENTAL

A single dose of Butantan-DV + placebo, administered concomitantly in opposite arms on Day 1.

Biological: DENGUE: Dengue 1,2,3,4 (attenuated) vaccine

Chikungunya vaccine only

EXPERIMENTAL

A single dose of VLA1555 + placebo, administered concomitantly in opposite arms on Day 1.

Biological: Chikungunya (CHIKV) live attenuated vaccine (VLA1555)

Interventions

DENGUE: Dose 10\^2.5-4.1 PFU per virus (1,2,3,4) Route: Subcutaneous CHIKUNGUNYA: Dose \>= 3.0 log TCID50 per 0.5 mL Route: Intramuscular

Dengue and Chikungunya vaccines co-administered

DENGUE: Dose 10\^2.5-4.1 PFU per virus (1,2,3,4) Route: Subcutaneous

Dengue vaccine only

CHIKUNGUNYA: Dose \>= 3.0 log TCID50 per 0.5 mL Route: Intramuscular

Chikungunya vaccine only

Eligibility Criteria

Age18 Years - 59 Years
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64)

You may qualify if:

  • Male or female adults aged 18 to 59 years at the time of vaccination.
  • Signed informed consent by the participant or their legal representatives.
  • Ability to understand, based on the investigator's assessment, and agree to comply with all study procedures, including blood collection.

You may not qualify if:

  • Participation in another clinical trial within 28 days prior to screening or planned participation in another clinical study during the trial period.
  • Pre-existing unstable health condition. An unstable health condition is defined as a disease requiring a change in treatment or hospitalization due to disease worsening within 90 days prior to screening.
  • Vaccination within 14 days prior to screening with any inactivated vaccine or within 28 days prior to screening with any live attenuated vaccine, or planned vaccination with any vaccine up to 28 days after study vaccination.
  • Known hypersensitivity to any component of the vaccines.
  • Thrombocytopenia or bleeding disorders that contraindicate intramuscular vaccination or venipuncture for blood collection.
  • Receipt of immunoglobulins, blood, or blood products within 180 days prior to screening.
  • Altered immunocompetence (immunosuppression, immunodeficiency, or immunocompromise) primary or secondary due to: Clinical conditions (including but not limited to renal failure, liver failure with cirrhosis, heart failure class III or IV according to the New York Heart Association, HIV infection, and asplenia).
  • Use of systemic corticosteroids (oral, intravenous, or intramuscular) at a dose equivalent to ≥20 mg/day of prednisone for more than 14 days or a cumulative dose greater than 280 mg within the last 90 days prior to screening. Topical, inhaled, and intranasal corticosteroids are allowed. Intermittent use (a single dose within the last 30 days prior to screening) of intra-articular corticosteroids is also allowed.
  • Receipt of antineoplastic agents, immunosuppressants, immunomodulators, or radiotherapy within the last 180 days prior to screening.
  • Malignancy at the time of screening or a history of malignancy with \<5 years of disease-free status at screening (except for basal cell carcinoma of the skin and localized prostate cancer under active surveillance).
  • Abuse of alcohol and illicit drugs within the past 12 months before screening that may compromise study compliance, at the investigator's discretion.
  • Being part of the study team, having a first-degree relative (parents, children, in-laws, stepchildren, sons-in-law, or daughters-in-law) or living in the same household as a study team member.
  • Prior exposure to dengue and chikungunya viruses, i.e., non-reactive IgM and IgG as screened by specific ELISA for both viruses. In case of doubt or indeterminate ELISA results, at least two consecutive samples will be collected. If doubt persists after two test collections, the participant will be excluded.
  • For female participants of childbearing potential: Pregnancy (confirmed by a positive β-hCG test), breastfeeding, or intention to engage in sexual activity with reproductive potential without using a contraceptive method for 90 days following vaccination.
  • Previous receipt of any dengue or chikungunya vaccine.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (7)

Centro Médico de São Francisco

Curitiba, Paraná, 80810-050, Brazil

Location

Centro de Pesquisa Inova

Toledo, Paraná, 85902-010, Brazil

Location

Hospital São Vicente de Paulo

Passo Fundo, Rio Grande do Sul, 99010-080, Brazil

Location

Hospital Escola da Universidade Federal de Pelotas

Pelotas, Rio Grande do Sul, 96040-010, Brazil

Location

Reumacenter

Porto Alegre, Rio Grande do Sul, 90480-000, Brazil

Location

UBEA - União Brasileira de Educação e Assistência Hospital São Lucas da PUCRS

Porto Alegre, Rio Grande do Sul, 90610-000, Brazil

Location

Instituto de Pesquisa em AIDS do Estado do Rio Grande do Sul - IPARGS

Porto Alegre, Rio Grande do Sul, 91350-180, Brazil

Location

Related Publications (7)

  • Bonanni P, Steffen R, Schelling J, Balaisyte-Jazone L, Posiuniene I, Zatonski M, Van Damme P. Vaccine co-administration in adults: An effective way to improve vaccination coverage. Hum Vaccin Immunother. 2023 Dec 31;19(1):2195786. doi: 10.1080/21645515.2023.2195786. Epub 2023 Apr 11.

    PMID: 37039318BACKGROUND
  • Wressnigg N, Hochreiter R, Zoihsl O, Fritzer A, Bezay N, Klingler A, Lingnau K, Schneider M, Lundberg U, Meinke A, Larcher-Senn J, Corbic-Ramljak I, Eder-Lingelbach S, Dubischar K, Bender W. Single-shot live-attenuated chikungunya vaccine in healthy adults: a phase 1, randomised controlled trial. Lancet Infect Dis. 2020 Oct;20(10):1193-1203. doi: 10.1016/S1473-3099(20)30238-3. Epub 2020 Jun 1.

  • Schneider M, Narciso-Abraham M, Hadl S, McMahon R, Toepfer S, Fuchs U, Hochreiter R, Bitzer A, Kosulin K, Larcher-Senn J, Mader R, Dubischar K, Zoihsl O, Jaramillo JC, Eder-Lingelbach S, Buerger V, Wressnigg N. Safety and immunogenicity of a single-shot live-attenuated chikungunya vaccine: a double-blind, multicentre, randomised, placebo-controlled, phase 3 trial. Lancet. 2023 Jun 24;401(10394):2138-2147. doi: 10.1016/S0140-6736(23)00641-4. Epub 2023 Jun 12.

  • Nogueira ML, Cintra MAT, Moreira JA, Patino EG, Braga PE, Tenorio JCV, de Oliveira Alves LB, Infante V, Silveira DHR, de Lacerda MVG, Pereira DB, da Fonseca AJ, Gurgel RQ, Coelho IC, Fontes CJF, Marques ETA, Romero GAS, Teixeira MM, Siqueira AM, Boaventura VS, Ramos F, Junior EE, de Moraes JC, Whitehead SS, Esteves-Jaramillo A, Shekar T, Lee JJ, Macey J, Kelner SG, Coller BG, Boulos FC, Kallas EG; Phase 3 Butantan-DV Working Group. Efficacy and safety of Butantan-DV in participants aged 2-59 years through an extended follow-up: results from a double-blind, randomised, placebo-controlled, phase 3, multicentre trial in Brazil. Lancet Infect Dis. 2024 Nov;24(11):1234-1244. doi: 10.1016/S1473-3099(24)00376-1. Epub 2024 Aug 5.

  • Kallas EG, Cintra MAT, Moreira JA, Patino EG, Braga PE, Tenorio JCV, Infante V, Palacios R, de Lacerda MVG, Batista Pereira D, da Fonseca AJ, Gurgel RQ, Coelho IC, Fontes CJF, Marques ETA, Romero GAS, Teixeira MM, Siqueira AM, Barral AMP, Boaventura VS, Ramos F, Elias Junior E, Cassio de Moraes J, Covas DT, Kalil J, Precioso AR, Whitehead SS, Esteves-Jaramillo A, Shekar T, Lee JJ, Macey J, Kelner SG, Coller BG, Boulos FC, Nogueira ML. Live, Attenuated, Tetravalent Butantan-Dengue Vaccine in Children and Adults. N Engl J Med. 2024 Feb 1;390(5):397-408. doi: 10.1056/NEJMoa2301790.

  • Kallas EG, Precioso AR, Palacios R, Thome B, Braga PE, Vanni T, Campos LMA, Ferrari L, Mondini G, da Graca Salomao M, da Silva A, Espinola HM, do Prado Santos J, Santos CLS, Timenetsky MDCST, Miraglia JL, Gallina NMF, Weiskopf D, Sette A, Goulart R, Salles RT, Maestri A, Sallum AME, Farhat SCL, Sakita NK, Ferreira JCOA, Silveira CGT, Costa PR, Raw I, Whitehead SS, Durbin AP, Kalil J. Safety and immunogenicity of the tetravalent, live-attenuated dengue vaccine Butantan-DV in adults in Brazil: a two-step, double-blind, randomised placebo-controlled phase 2 trial. Lancet Infect Dis. 2020 Jul;20(7):839-850. doi: 10.1016/S1473-3099(20)30023-2. Epub 2020 Mar 24.

  • Chen LH, Fritzer A, Hochreiter R, Dubischar K, Meyer S. From bench to clinic: the development of VLA1553/IXCHIQ, a live-attenuated chikungunya vaccine. J Travel Med. 2024 Oct 19;31(7):taae123. doi: 10.1093/jtm/taae123.

MeSH Terms

Conditions

DengueChikungunya Fever

Interventions

Vaccines, AttenuatedVaccines

Condition Hierarchy (Ancestors)

Mosquito-Borne DiseasesVector Borne DiseasesInfectionsArbovirus InfectionsVirus DiseasesFlavivirus InfectionsFlaviviridae InfectionsRNA Virus InfectionsHemorrhagic Fevers, ViralAlphavirus InfectionsTogaviridae Infections

Intervention Hierarchy (Ancestors)

Biological ProductsComplex Mixtures

Central Study Contacts

Clóvis Arns da Cunha, MD, PhD

CONTACT

Study Design

Study Type
interventional
Phase
phase 3
Allocation
RANDOMIZED
Masking
TRIPLE
Who Masked
PARTICIPANT, CARE PROVIDER, INVESTIGATOR
Masking Details
To ensure blinding of both participants and the study team performing safety assessments, vaccine preparation will be conducted by unblinded team members in a separate room, following the four-eyes principle (two individuals supervising the process). The syringes for different vaccination regimens will be pre-masked before being delivered to the study sites, ensuring the blinding process is maintained.
Purpose
PREVENTION
Intervention Model
PARALLEL
Model Details: Phase 3b Multicenter, Randomized, Controlled, Double-Blind Clinical Trial to Evaluate the Immunogenicity and Safety of the Co-administration of Live Attenuated Dengue and Chikungunya Vaccines Compared to Separate Administration.
Sponsor Type
OTHER GOV
Responsible Party
SPONSOR

Study Record Dates

First Submitted

April 28, 2025

First Posted

May 15, 2025

Study Start

March 31, 2026

Primary Completion (Estimated)

July 1, 2026

Study Completion (Estimated)

October 1, 2026

Last Updated

March 6, 2026

Record last verified: 2026-03

Data Sharing

IPD Sharing
Will not share

Locations