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COVID-19 Cohort Study (CCS): Study of the epidemiology of COVID-19 in healthcare workers and their households

Join a research study about COVID-19 in hospital workers

Status: Currently enrolling Click here to join Already a participant? Click here to log in

What is being studied?

  • The number of COVID-19 infections and factors linked with infection
  • Antibodies against COVID-19
  • Effect of COVID-19 vaccines
  • Psychological impact of working during a pandemic

Who can participate?
Staff working at any of the hospitals/sites associated with either Hamilton Health Sciences (HHS) or St. Joseph’s Healthcare Hamilton (SJHH)

  • Who are 18-75 years of age
  • Who work anywhere in the hospital for more than 20 hours per week OR - is a MD/NP with privileges and spends at least 8 hours per week in the hospital
  • Who have access to a computer or phone with internet access, and
  • Who plan to be available at least for the next 3 months

What is required?

  • Questionnaires:
    • When you join
    • every 2nd week
    • when you are tested for COVID-19 --or-- have symptoms that might be COVID
    • when you are vaccinated against COVID
  • Blood samples:
    • when you join
    • 30 days after you are vaccinated --or-- test positive for COVID-19
    • about every 180 days after that
  • Optional:
    • invite adults & children in your home to join


Participation is voluntary

A small monetary gift is available for participating.

People are welcome to join whether or not they have been vaccinated against COVID-19.

If you have questions, please email [email protected] or call (416) 294-6383 between 9:00 AM and 5:00 PM business days.

Hamilton site investigators:  Dr. Mark Loeb (HHS) & Dr. Marek Smieja (SJHH)

Click here to join Already a participant? Click here to log in

Information Sheet and Consent Form