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Providing Additional Information on the Safety and Effectiveness of an Ebola Vaccine

18. december 2018 opdateret af: Epicentre

An Open-label, Single Arm Study to Provide Additional Information on Safety and Effectiveness of rVSVΔG-ZEBOV-GP

Interventional, single arm, open-label, non-randomized, phase IIIb study to accumulate additional data on safety and effectiveness of one dose of rVSVΔG-ZEBOV-GP against Ebola virus disease.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Ebola Virus Disease remains ill-known by populations, creating fear and mistrust, is highly contagious, requiring strict isolation measures and with only supportive therapy available that has limited impact on case-fatality which remains high (30 -80%).1 Among vaccines in development, the rVSVΔG-ZEBOV-GP vaccine has given the most promising results in terms of efficacy and safety having been evaluated now in more than 10,000 individuals.

Ring vaccination is a known strategy to control epidemics with specific transmission chains and has been successfully implemented to eradicate smallpox. Ring vaccination enhances standard public health measures of contact tracing, isolation, and community engagement and could be effective when such measures are in place. Building on the interim results of the Ebola ça Suffit trial, there is a need for continued access to a vaccine of which available results suggest that it is safe and likely efficacious against EVD. Although only isolated cases have been reported in Guinea, Sierra Leone and Liberia in 2016, 10 the risk of resurgence or of continued isolated cases in West Africa remains. Moreover, a new outbreak with Ebola Zaïre could start any moment in any of the countries where previous outbreaks occurred as in for example Democratic Republic of Congo and Uganda.

However, the unusual design of the ring trial and the decision to abandon the control group because of strong evidence that the vaccine prevented disease means there may not be enough data to ensure approval from regulatory agencies. Therefore, additional information is still required to consolidate knowledge on the rVSVΔG-ZEBOV-GP vaccine to support regulatory approval and licensure for future access. Additional information is also needed on ring vaccination and contextual adaptations to this approach to ensure its feasibility and effectiveness in the control of Ebola outbreaks in potentially diverse contexts.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

500

Fase

  • Fase 3

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

1 år og ældre (Barn, Voksen, Ældre voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Individuals aged 6 years or older will be enrolled in the study if they are a contact or contact of contact of a laboratory-confirmed Ebola virus disease case. Children aged between 1 and 6 years may also be enrolled in the study in case there is a confirmed contact with a laboratory-confirmed Ebola patient
  • willing to accept weekly visits
  • intending to remain in the study area for three months
  • providing informed consent, and where applicable, assent

Exclusion Criteria:

  • history of EVD (self-report or laboratory confirmed)
  • history of having received other investigational research agents in the previous 28 days
  • history of anaphylaxis to a vaccine or vaccine component (self-report)
  • severe illness that makes the person bed-bound or requiring hospitalization at the time of the vaccination
  • severe immunocompromised status
  • history of having received immunosuppressant therapies that would substantially interfere with the mode of action of the Ebola vaccine in the previous 6 months
  • unwilling to accept weekly visits
  • not intending to remain in the study area for three months
  • informed consent or assent not provided
  • any other condition in which, in the judgment of the investigator, would interfere with or serve as a contraindication to protocol adherence, or impair the subject or caregiver's ability to give informed consent, and where applicable, assent.
  • fever above 38°C
  • previous receipt of rVSVΔG-ZEBOV-GP in the last 3 years or at being part of another Ebola vaccine clinical trial.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Forebyggelse
  • Tildeling: N/A
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Single arm
Vaccination of contacts and contacts of contacts of a confirmed Ebola Zaire case with one dose of rVSVΔG-ZEBOV-GP (≥ 2x10^7 PFU)
Ring vaccination with vaccination of contacts and contacts of contacts after laboratory confirmation of one Ebola Zaire case

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Cumulative incidence
Tidsramme: 84 days after vaccination
Occurrence of Ebola Zaire cases amongst contacts and contacts of contacts
84 days after vaccination

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Assessment of Adverse and Serious Adverse Events
Tidsramme: 84 days after vaccination
Safety of a single dose of rVSVΔG-ZEBOV-GP
84 days after vaccination

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Samarbejdspartnere

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

28. maj 2018

Primær færdiggørelse (Faktiske)

14. juli 2018

Studieafslutning (Faktiske)

30. november 2018

Datoer for studieregistrering

Først indsendt

18. maj 2017

Først indsendt, der opfyldte QC-kriterier

18. maj 2017

Først opslået (Faktiske)

19. maj 2017

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

19. december 2018

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

18. december 2018

Sidst verificeret

1. december 2018

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • V920-01

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

UBESLUTET

IPD-planbeskrivelse

To be done following MSFdata sharing policy

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med Ebola virus sygdom

Kliniske forsøg med rVSVΔG-ZEBOV-GP

Søg i lignende forsøg