Our project’s aim is to learn more about the effectiveness, safety, and immune response in individuals with low or compromised immune systems
who have been vaccinated with the Pfizer-BioNTech or Moderna mRNA or Astrazeneca COVID-19 vaccines.
Interested in joining our study? We are currently recruiting the following participants from across Canada:
All ages considered eligible by Health Canada to receive the COVID-19 vaccinations who are either healthy or
have primary immunodeficiency (inborn error of immunity) or
have been on immunotherapy such as rituximab, ocrelizumab for medical conditions AND:
Have not been vaccinated but plan to be vaccinated against COVID-19, or
Have received their primary series (2 doses for healthy participants or 3 doses for immunocompromised
participants) of the COVID-19 Pfizer/BioNTech, Moderna mRNA, or AstraZeneca vaccination, or
Were fully vaccinated including first booster (Dose 3 for healthy participants or Dose 4 for immunocompromised
participants) against COVID-19 less than 24 weeks ago.