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Clinical Trial Summary

This study has been designed to investigate if:

1. BMI affects the immunogenicity of influenza and pertussis vaccines given during pregnancy.

2. If pertussis vaccine co-administered with influenza vaccine impacts on the immunogenicity of the influenza vaccine.

3. If BMI affects transplacental antibody transfer efficiency following maternal vaccinations.

Clinical Trial Description

A clinical observation study to determine whether obesity during pregnancy is associated with altered immunogenicity of influenza and pertussis vaccines during pregnancy. The study will also assess vaccine specific antibody concentrations in cord blood collected from vaccinated women at the time of delivery to estimate any effect of obesity on transplacental transfer of antibodies and will measure and compare cytokine profiles between obese and non-obese participants to determine any correlation with immune responses. This study will enrol 150 pregnant women (50 obese and 100 non-obese) during 2017-2019 to receive a recommended, licensed influenza vaccine (FluQuadri) as well as pertussis vaccination (Adacel) for women enrolled in their third trimester, as part of routine antenatal care. Local and systemic adverse events will be captured using a 7 day diary card and unexpected or serious adverse events will be recorded for the duration of the study. Blood samples will be collected to measure antigen specific vaccine antibody responses. The proportion of influenza vaccine recipients achieving seroprotective antibody titres at 4 weeks post vaccination and persisting at 6 months post vaccination be compared between obese and non-obese recipients. ;

Study Design

Related Conditions & MeSH terms

NCT number NCT03457194
Study type Observational
Source Women's and Children's Hospital, Australia
Contact Michelle F Clarke, MLS,GDSC,MPH
Phone (08) 81618105
Status Recruiting
Start date July 19, 2018
Completion date May 30, 2021

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