About CANVAS

About the CANVAS-COVID Study

Why: The purpose of this study is to find out how often health events occur after a COVID-19 vaccine. The CANVAS surveillance network complements Canada’s passive vaccine safety surveillance system with rapid information early in the COVID-19 vaccine campaign. 

Who: We are looking for adolescents under 20 years of age or parents of children 5 years of age or older to participate. You can take part in this study if you have an email address, telephone number and a device to answer online surveys. If you or your child have been vaccinated in the last 7 days click here. If you or your child have not been vaccinated click here. If it has been longer than 7 days since you or your child’s first vaccine you cannot participate.

Where: This study will take place in 7 provinces and territories: British Columbia, Alberta, Ontario, Quebec, Nova Scotia, PEI and the Yukon.

How your participation makes a difference: 

By joining our study you are contributing valuable early data on the safety of COVID-19 vaccines in Canadians. Post-marketing vaccine safety surveillance is an important step in ensuring vaccine safety. 

Study Activities

Study participants will be asked to complete three online surveys:

  • 8 days AFTER you (your child) get the first COVID-19 vaccine
  • 8 days AFTER you  (your child) get the second COVID-19 vaccine
  • 6 months AFTER your  (your child’s) second COVID-19 vaccine


The surveys will collect basic demographics data about the participant (you or your child’s age, sex, gender, underlying health conditions) and any information about illnesses since the last vaccine. 

If you report a health problem which required a medical visit, we may call you to find out more about the symptoms of the health problem. 


Non-Vaccinated Group

The purpose of the study is to find out how often health events occur after a COVID-19 vaccine. To do this, we also need to monitor health events in people who did NOT get a COVID-19 vaccine. We need to measure the background illness of the population because it helps us better measure any increase in illness that may happen after getting a COVID-19 vaccine.

You can participate in the non-vaccinated (control) group if the participant (you or your child) have NOT received a COVID-19 vaccine. If you would like to participate, you will need to complete an online survey.

If you or your child join the non-vaccinated group, you may also re-join the vaccinated group after receiving a vaccine at a later date.


CANVAS History

The Canadian National Vaccine Safety (CANVAS) network is designed to conduct active safety surveillance for pandemic vaccines (e.g., H1N1 influenza vaccine in 2009), seasonal influenza vaccines (2010-2020) and other new vaccines (e.g., meningococcal B vaccine in Quebec in 2014) to inform public health authorities about their safety.