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Hutterite Influenza Prevention Study

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ClinicalTrials.gov Identifier: NCT00877396
Recruitment Status : Completed
First Posted : April 7, 2009
Last Update Posted : September 28, 2011
Canadian Institutes of Health Research (CIHR)
Information provided by (Responsible Party):
Mark Loeb, McMaster University

Brief Summary:
The goal of this randomized clinical trial is to determine whether immunizing children in Hutterite colonies with inactivated influenza vaccine can prevent influenza and its complications in other colony members. Furthermore, the study will assess the indirect benefit to Hutterites at high risk of complications. The study is a blinded, cluster randomized controlled trial among Hutterite colonies to test the hypothesis that high immunization rates (>70%) of healthy children with inactivated influenza vaccine reduces transmission of influenza to other colony members. Randomization of these homogeneous, moderately sized colonies where there is regular spread facilitated by a communal lifestyle, but limited re-introduction because of relative isolation from outside community, represents a unique opportunity to test the hypothesis of indirect benefit under close to ideal conditions. The primary outcome will be laboratory-confirmed influenza. Secondary outcomes include influenza-like illness, otitis media, physician visits, antimicrobial prescriptions, absenteeism, lower respiratory tract infection, hospitalizations, and death.

Condition or disease Intervention/treatment Phase
Influenza Biological: Influenza vaccination Biological: Hepatitis A Vaccine Phase 4

Detailed Description:

Colonies will be enrolled in September 2008.

Healthy Hutterite Children will be vaccinated in October, in each year of the study (2008, 2009, & 2010)

Influenza Surveillance phase will begin around December-January of each year.

  • All study outcomes will be collected during the Surveillance phase of the study from Dec to June for 3 years.
  • Outcomes will be collected when research nurses visit the colonies. A research nurse will visit enrolled colonies twice a week during the surveillance phase and review study diaries and obtain swabs from participants with symptoms of influenza.

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 4771 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: Does Vaccinating Health Hutterite Children Against Influenza Prevent Influenza in Other Hutterite Colony Members: A Randomized Cluster Trial
Study Start Date : September 2008
Primary Completion Date : May 2011
Study Completion Date : July 2011

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Flu Flu Shot
U.S. FDA Resources

Arm Intervention/treatment
Experimental: Influenza
Inactivated Influenza vaccination
Biological: Influenza vaccination
Influenza vaccination- 0.5 mL. Children under 9 who have never received a influenza vaccine will receive a 2nd dose (0.5 mL) 4 weeks later.
Other Name: Vaxigrip by Sanofi Pasteur
Placebo Comparator: Control
Hepatitis A vaccine
Biological: Hepatitis A Vaccine
Hepatitis vaccination- 0.5 mL. Children under 9 who have never received a influenza vaccine will receive a 2nd dose ( saline- 0.5 mL) 4 weeks later.
Other Name: Avaxim Pediatric by Sanofi Pasteur

Primary Outcome Measures :
  1. laboratory-confirmed influenza infection [ Time Frame: Dec to June each year for 3 years ]

Secondary Outcome Measures :
  1. Influenza like illness [ Time Frame: Dec to June each year for 3 years ]
  2. Physician diagnosed otitis media [ Time Frame: Dec to June each year for 3 years ]
  3. School or work related absenteeism [ Time Frame: Dec to June each year for 3 years ]
  4. Physician visits for respiratory illness [ Time Frame: Dec to June each year for 3 years ]
  5. Lower respiratory infection or pneumonia [ Time Frame: Dec to June each year for 3 years ]
  6. Hospitalizations for LRTI or pneumonia [ Time Frame: Dec to June each year for 3 years ]
  7. All cause hospitalizations [ Time Frame: Dec to June each year for 3 years ]
  8. Deaths due to LRTI or pneumonia [ Time Frame: Dec to June each year for 3 years ]
  9. All-cause deaths [ Time Frame: Dec to June each year for 3 years ]

Information from the National Library of Medicine

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Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Group A:

Inclusion Criteria:

  • Hutterites other than the healthy children who will be immunized. Although this category as a whole will be used to assess indirect benefit of the vaccine in the main analysis, Hutterites at high risk for influenza complications within this category will be assessed in a separate analysis. These are defined as anyone in one or more of the following groups:
  • individuals aged ≥ 65 years
  • children 23 months of age or less
  • anyone with ≥ 1 of the following conditions severe enough to require regular medical follow-up or hospital care:

    • chronic cardiac or pulmonary disorders (including bronchopulmonary dysplasia, cystic fibrosis, and asthma)
    • diabetes mellitus and other metabolic diseases
    • cancer
    • immunodeficiency
    • immunosuppression (due to underlying disease and/or therapy)
    • renal disease
    • anemia
    • hemoglobinopathy
    • any condition that can compromise respiratory function or the handling of respiratory secretions or that can increase the risk of aspiration.

Exclusion Criteria:

  • There are no exclusion criteria for this category of participants.

Group B:

Inclusion Criteria:

  • Healthy children aged 36 months to 15 years who will be immunized as part of the intervention.

Exclusion Criteria:

  • Anaphylactic reaction to a previous dose of influenza vaccine
  • Anaphylactic reaction to hepatitis A vaccine
  • Anaphylactic reaction to neomycin
  • Known IgE-mediated hypersensitivity to eggs manifested as hives
  • Swelling of the mouth and throat, difficulty in breathing, hypotension, or shock
  • Guillain-Barré syndrome within eight weeks of a previous influenza vaccine.

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): NCT00877396

Sponsors and Collaborators
McMaster University
Canadian Institutes of Health Research (CIHR)
Principal Investigator: Mark B Loeb, MD McMaster University