Influenza IMPRINT Cohort: Defining the Impact of Initial Influenza Exposure on Immunity in Infants

Last updated: November 4, 2025
Sponsor: Children's Hospital Medical Center, Cincinnati
Overall Status: Active - Not Recruiting

Phase

N/A

Condition

Influenza

Treatment

N/A

Clinical Study ID

NCT05436184
1U01AI144673-01
1U01AI144673-01
  • All Genders
  • Accepts Healthy Volunteers

Study Summary

The primary aim is to define the immune responses to the infant's initial influenza exposure (vaccine or infection) and how that affects the immune response to subsequent influenza exposures

Eligibility Criteria

Inclusion

Inclusion Criteria:

  • Mother pregnant and ≥ 34 weeks gestation and ≥ 18 yrs. of age

  • Plans to deliver at local hospital

  • Lives within designated home zip codes:

  • No plans to move outside study area within study timeframe

  • Cell phone that can be used for text messaging

  • Singleton live born infant, born ≥ 34 weeks gestational age (GA)

Exclusion

Exclusion Criteria:

  • Fetal or infant death prior to maternal hospital discharge

  • Mother known to be infected with HIV based on medical records

  • Major congenital anomalies, prenatally diagnosed or other major disorder or anomalyas determined by the PI

  • Reported use of heroin, cocaine or methamphetamines during pregnancy

  • Adoptive infant

  • Enrolled in any investigational vaccine trial or other interventional randomized,clinical trial involving the mother or infant that the PI's deem to be in conflictwith study outcomes

Study Design

Total Participants: 1500
Study Start date:
October 17, 2019
Estimated Completion Date:
December 31, 2028

Study Description

Vaccination is a leading public health intervention for reducing morbidity and mortality from influenza worldwide. Vaccine optimization is hampered by lack of understanding the natural history of infection and immunity, including the full complement of maternal immunity imparted to infants. This gap in understanding can be addressed only through a well-designed birth cohort study. Up to 1500 mother-infant pairs will be enrolled at or after week 34 in pregnancy over three flu seasons, up to four years of age depending on birth month, at two sites. Follow-up will occur from the third trimester until the child is three to four years of age, along with medical records review to ascertain outcomes not captured through weekly illness and respiratory surveillance, and medical record review up to 18 years of age. The primary aim is to rigorously document the natural history of infection and immune response to influenza in study infants for at least three entire flu seasons.

Connect with a study center

  • Cincinnati Children's Hospital Medical Center

    Cincinnati, Ohio 45219
    United States

    Site Not Available

  • Cincinnati Children's Hospital Medical Center

    Cincinnati 4508722, Ohio 5165418 45219
    United States

    Site Not Available

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