No doctor’s notes for COVID-19. What you CAN ask:

1. Body temperature check
2. Are you displaying any other symptoms of COVID-19 within past 48 hours–cough, fever, shortness of breath, difficulty breathing, sore throat, sudden loss of smell
3. Risk Factors: i. Have you been out of Canada in past 14 days? and ii. Have you had close contact, i.e, within 6 feet/2 meters of person known to have COVID-19

If they have fever, or answer YES to symptoms or either of the risk factors, you must deny them entry, send them home and tell them to self-isolate for 14 days. No exceptions for Qs 1 and 2 but one possible exception for Q3: If the employee is a health care or critical infrastructure services worker, you can let them continue working even if they answer YES to Q3, provided that they self-monitor, wear mask at all times, remain the required 6 feet away with no exceptions and show no symptoms. The moment they show symptoms, you gotta send them home.    Check out: https://hrinsider.ca/social-distancing-the-10-things-to-include-in-your-covid-19-screening-policy/
Hope that helps. Glenn