COVID-19 and children: Seroprevalence study (EnCORE)

The EnCORE study is a research project that will estimate how many children (aged 2 to 17 years) have been infected with SARS-CoV-2, the virus that causes COVID-19 infection.

It is extremely important to know how many children have been infected with SARS-CoV-2 since the beginning of the pandemic. This will allow us to better understand how much virus spread or transmission has occurred in children who live in Montréal. This information is needed to help guide decision making about prevention strategies in neighbourhoods, schools, and daycares. To do this, there is a blood test (serology) to check for the presence of antibodies (antibodies are normally developed in our blood to fight infections). The presence of these antibodies will allow us to determine if a child has been infected in the past.

In addition, children have faced enormous disruptions in their lives since the beginning of the COVID-19 pandemic. Monitoring the emotional and mental health in children is critical as the situation of COVID-19 continues to evolve.

Participate, it's easy!

Our animated video explains the EnCORE study for both children and parents!

How does the study work?

Elementary schools, high schools, and daycares have been randomly selected in four Montreal neighbourhoods. See the list of selected schools and daycares.

All parents and legal guardians with children in the selected schools and daycares are invited to have their children participate in the study. We will collect information about your child twice, once this fall and again at the end of the school year. Participation requires three different steps:

Give your consent
Complete the consent form and obtain your child's approval to participate in the study.

Complete an online questionnaire
This questionnaire will collect information about your child's health, including emotional and mental health, as well as household information.

Finger prick test
The study also requires a small blood sample from the child, using a finger prick test.

Need help?

If anything is not clear, research study staff are available by email :
or phone or SMS at 1-866-362-6730 (1-866-encore0) to answer your questions.

For our children,
for our community,
and for the fight against COVID-19