Direct and Indirect Protection by Influenza Vaccine Given to Children in India

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE4

Total Enrollment

4598 participants

Study Classification

INTERVENTIONAL

Study Start Date

2009-09-30

Study Completion Date

2012-07-31

Brief Summary

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The study described here will immunize children with trivalent influenza vaccine (TIV) and determine whether this reduces influenza illness among the immunized children and their older family members. The comparison or control group for the children receiving influenza vaccine will be children immunized with inactivated poliovirus vaccine (IPV). The study will also provide information on the amount of disease produced by influenza in the study population.

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Detailed Description

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Influenza is an important cause of illness among children and adults in the United States. Influenza is likely also an important cause of illness in India, but published data on influenza infections in India are limited, especially for children. Although influenza vaccines are used routinely in the United States, including in young children, influenza vaccines have not seen widespread use in India. This is likely due to the lack of information from India about disease burden due to influenza and because the influenza vaccines have never been tested for efficacy in India. In addition, because young children are thought to be important in the spread of influenza in families, it is possible immunization of children against influenza will reduce influenza infections among older children and adults in the home.

Conditions

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Influenza

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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Inactivated Polio Vaccine (IPV)

Inactivated trivalent poliovirus vaccine (IPV) age Dose # doses/year 1 # doses year 2 and 3 6 mo -8y 0.5 ml 2 1 9-10 y 0.5 ml 1 1

Group Type ACTIVE_COMPARATOR

Inactivated polio vaccine (IPV)

Intervention Type BIOLOGICAL

Vaccine administration will occur twice, one month apart, in the first year of participation in the study to parallel administration of TIV (experimental intervention). Subsequent years will provide one immunization except 2011 schedule modified to accommodate changes in TIV schedule as per above..

Inactivated Trivalent Influenza Vaccine

Inactivated split virion trivalent influenza vaccine (TIV) age Dose # doses year 1 # doses year 2 and 3 6-35 mo 0.25 ml 2 1 3-8 y 0.5 ml 2 1 9-10 y 0.5 ml 1 1

Group Type EXPERIMENTAL

Inactivated Trivalent Influenza Vaccine

Intervention Type BIOLOGICAL

Vaccine administration will occur twice, one month apart, in the first year of participation in the study. This will occur as TIV vaccine becomes available in India, in the early autumn. Subsequent years will provide one immunization. Due to the inclusion of the pandemic 2009 influenza A H1N1 virus in the 2010-2011 northern hemisphere vaccine formulation and recommendations that children should receive 2 doses of this vaccine this study will administer 2 doses of vaccine in the second year of the study.

Surveillance arm

Those ineligible for vaccination will be enrolled for febrile acute respiratory illness (FARI) surveillance to assess indirect effects of vaccination in household members.

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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Inactivated Trivalent Influenza Vaccine

Vaccine administration will occur twice, one month apart, in the first year of participation in the study. This will occur as TIV vaccine becomes available in India, in the early autumn. Subsequent years will provide one immunization. Due to the inclusion of the pandemic 2009 influenza A H1N1 virus in the 2010-2011 northern hemisphere vaccine formulation and recommendations that children should receive 2 doses of this vaccine this study will administer 2 doses of vaccine in the second year of the study.

Intervention Type BIOLOGICAL

Inactivated polio vaccine (IPV)

Vaccine administration will occur twice, one month apart, in the first year of participation in the study to parallel administration of TIV (experimental intervention). Subsequent years will provide one immunization except 2011 schedule modified to accommodate changes in TIV schedule as per above..

Intervention Type BIOLOGICAL

Other Intervention Names

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split virion trivalent influenza vaccine, Vaxigrip Imovax

Eligibility Criteria

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Inclusion Criteria

* Inclusion in either vaccine group (TIV or IPV) will require ages 6 months through 10 years of age.
* All individuals in enrolled households will be eligible for enrollment into surveillance arm.

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes