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Children and COVID-19: seroprevalence study (EnCORE)

Sub-Study CHOIR


The study aims to understand how effective vaccines against COVID-19 are in immunosuppressed young people.

Details & registration >>

Principal investigators

Dr. Caroline Quach

Dr. Hélène Decaluwe

Main objective

We are currently recruiting 4 to 11 years old who are not yet vaccinated against COVID-19 but who will receive their first dose of the vaccine soon. This includes children who participated in the EnCORE study, but also children who didn’t, such as siblings or friends, who would be interested. 

Contribution of the patient 

The study includes home-visits or clinics at the CHU Sainte-Justine with a research nurse including a blood draw and a saliva sample collection. Your child will be compensated $50 for their effort after each visit.

Why participate?

Your child will not obtain any personal benefit from participating in this research project. Importantly, the results from this study will contribute to the advancement of scientific knowledge of immune responses to SARS-CoV-2 infection and vaccination in children.

Risks and inconvenients

The disadvantage is the time required for the study, which is approximately 5 minutes to complete the questionnaire and 20 minutes to collect the blood and saliva samples. Taking blood is unpleasant and can cause bruising, discomfort or, more rarely, an infection. The amount of blood that will be drawn is safe.

Project team

Kate Zinszer, Assistant Professor, Université de Montréal, School of Public Health, Department of Social and Preventive Medicine

Caroline Quach, Full Professor, Université de Montréal, Faculty of Medicine, Department of Microbiology, Infectious Diseases and Immunology

Hélène Decaluwe, Associate Professor, Université de Montréal, Faculty of Medicine, Department of Microbiology, Infectious Diseases and Immunology

Carla Benea, EnCORE Sub-Study Coordinator 





About this page
Updated on 1/24/2022
Created on 1/24/2022
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