NCT03430388

Brief Summary

According to World Health Organization (WHO), since December 2016, Brazil is showing a significant increase in cases of yellow fever in humans. In view of this, vaccination is suitable for residents and travelers to the risk area. However, for immunosuppressed patients there is a formal recommendation not to vaccinate with live virus vaccine. On the other hand, the safety and efficacy of the vaccine has been demonstrated in patients with HIV, and safety and seroconversion have also been demonstrated in patients with rheumatic disease who were inadvertently revaccinated for yellow fever. Faced with the impossibility of leaving the high-risk area for some patients the vaccination could be released to only those who have low level of immunosuppression as suggested by some recommendations of medical societies. The availability of a fractional vaccine in the State of São Paulo, which has proved its efficacy, opens the possibility of exposure to a lower number of copies of the virus in the first exposure of immunosuppressed patients, allowing, if necessary, a safer revaccination, after 28 days to obtain of a more effective immunogenic response. The objectives of the study are to evaluate the immune response of the immunization with fractional yellow fever vaccine (neutralizing antibodies) in patients with systemic autoimmune rheumatic diseases residing in a high-risk area. Secondarily, evaluate the possible association between immunogenicity and vaccination with: demographic data, clinical and laboratory activity of the disease in patients with chronic rheumatic diseases, evaluate the curve of viremia and report adverse events. Patients and healthy controls will be vaccinated for yellow fever in the Immunization Center of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HC-FMUSP). The patients' screening for exclusion and inclusion criteria will be done at the rheumatology outpatient clinic after medical evaluation. For the controls will be the routine screening of the Immunization Center. The vaccination protocol will be a fractional dose of the yellow fever vaccine on day D0 for both groups. Patients will be evaluated on day D0, D5, D10, D30-4 and D365 and controls only on days D0, D10, D30-45 and D365 for aspartate aminotransferase (AST), alanine aminotransferase (ALT), platelets, urea and creatinine, immunoglobulin M (IgM) by immunofluorescence for Yellow Fever, viremia, autoantibodies.

Trial Health

87
On Track

Trial Health Score

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

Enrollment
600

participants targeted

Target at P75+ for not_applicable

Timeline
Completed

Started Jan 2018

Geographic Reach
1 country

1 active site

Status
completed

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

First Submitted

Initial submission to the registry

January 30, 2018

Completed
1 day until next milestone

Study Start

First participant enrolled

January 31, 2018

Completed
12 days until next milestone

First Posted

Study publicly available on registry

February 12, 2018

Completed
1 month until next milestone

Primary Completion

Last participant's last visit for primary outcome

March 24, 2018

Completed
11 months until next milestone

Study Completion

Last participant's last visit for all outcomes

February 24, 2019

Completed
Last Updated

April 26, 2019

Status Verified

January 1, 2018

Enrollment Period

2 months

First QC Date

January 30, 2018

Last Update Submit

April 25, 2019

Conditions

Keywords

vaccineYellow FeverRheumatic disease

Outcome Measures

Primary Outcomes (2)

  • Number of participants with severe adverse events to the fractional dose of Yellow Fever vaccine

    Comparison of adverse events rates (based on the Brighton Collaboration diagnostic criteria) between rheumatic disease patients and healthy controls after Yellow Fever vaccine

    10 days

  • Number of participants with protective levels of antibodies against Yellow Fever vaccine

    Comparison of protective antibodies rates (measured by indirect immunofluorescence) against Yellow Fever virus between rheumatic disease patients and healthy controls after Yellow Fever vaccine

    30 days

Secondary Outcomes (2)

  • Association of number of patients with protective antibodies levels and disease activity in patients with chronic rheumatic diseases

    30 days

  • Number of participants with persistent protective levels of antibodies against Yellow Fever

    1 year

Study Arms (2)

Rheumatic diseases patients

ACTIVE COMPARATOR

Vaccination against Yellow Fever, fractional dose (0,1mL) of 17D vaccine

Biological: Yellow Fever vaccine (17D)

Healthy controls

ACTIVE COMPARATOR

Vaccination against Yellow Fever, fractional dose (0,1mL) of 17D vaccine

Biological: Yellow Fever vaccine (17D)

Interventions

Vaccination against Yellow Fever, fractional dose (0,1mL) of 17D vaccine

Healthy controlsRheumatic diseases patients

Eligibility Criteria

Age2 Years - 60 Years
Sexall
Healthy VolunteersYes
Age GroupsChild (0-17), Adult (18-64)

You may qualify if:

  • Rheumatic disease under low immunosuppression (hydroxychloroquine, sulfasalazine or methotrexate plus prednisone up to 7,5mg/day or leflunomide plus prednisone up to 7,5mg/day),
  • Resident in high risk área for Yellow Fever

You may not qualify if:

  • Active disease
  • Primary immunodeficiency
  • History of anaphylactic response to vaccine components or egg allergy
  • Living outside the risk area
  • Do not meet criteria for low immunosuppression
  • History of previous immunization with the yellow fever vaccine
  • History of live virus vaccine up to 4 weeks before
  • Individuals who do not agree to participate in the study and/or whose parents do not agree to participate in the study

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Rheumatology Division of Hospital das Clínicas da Faculdade de Medicina da Universidade de Sao Paulo

São Paulo, São Paulo, 05403-000, Brazil

Location

Related Publications (38)

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MeSH Terms

Conditions

Arthritis, RheumatoidSpondylarthritisMyositisScleroderma, SystemicMixed Connective Tissue DiseaseTakayasu ArteritisGranulomatosis with PolyangiitisSjogren's SyndromeArthritis, JuvenileDermatomyositisYellow FeverRheumatic Diseases

Interventions

Yellow Fever Vaccine

Condition Hierarchy (Ancestors)

ArthritisJoint DiseasesMusculoskeletal DiseasesConnective Tissue DiseasesSkin and Connective Tissue DiseasesAutoimmune DiseasesImmune System DiseasesSpondylitisSpinal DiseasesBone DiseasesMuscular DiseasesNeuromuscular DiseasesNervous System DiseasesSkin DiseasesAortic Arch SyndromesAortic DiseasesVascular DiseasesCardiovascular DiseasesArteritisVasculitisSkin Diseases, VascularLung Diseases, InterstitialLung DiseasesRespiratory Tract DiseasesAnti-Neutrophil Cytoplasmic Antibody-Associated VasculitisSystemic VasculitisXerostomiaSalivary Gland DiseasesMouth DiseasesStomatognathic DiseasesDry Eye SyndromesLacrimal Apparatus DiseasesEye DiseasesPolymyositisMosquito-Borne DiseasesVector Borne DiseasesInfectionsArbovirus InfectionsVirus DiseasesFlavivirus InfectionsFlaviviridae InfectionsRNA Virus InfectionsHemorrhagic Fevers, Viral

Intervention Hierarchy (Ancestors)

Viral VaccinesVaccinesBiological ProductsComplex Mixtures

Study Officials

  • Eloisa Bonfa, MD, PhD

    Rheumatology Division of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, SP - Brazil

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
not applicable
Allocation
NON RANDOMIZED
Masking
NONE
Purpose
PREVENTION
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

January 30, 2018

First Posted

February 12, 2018

Study Start

January 31, 2018

Primary Completion

March 24, 2018

Study Completion

February 24, 2019

Last Updated

April 26, 2019

Record last verified: 2018-01

Locations