COVID-19: Screening & Symptoms

Stay home if you are sick.  

Do not go to school, work or any other place if you are not feeling well. All sick individuals with any symptoms of any illness should stay home and seek assessment from their regular health care provider, if required.

If any member of your household (child or adult) has any symptoms of COVID-19, even if it is one symptom or it's mild, and even if they are fully vaccinated, the person with symptoms must self-isolate. Other household members must self-isolate as well, unless they are fully vaccinated or have previously tested positive for COVID-19 in the last 90 days and have been cleared of the infection.


Know the symptoms of COVID-19.

The most common symptoms of COVID-19, including variant of concern strains, that require immediate self-isolation and COVID-19 testing include:

  • Fever (temperature of 37.8°C/100°F or higher)
  • Chills
  • Cough or barking cough (croup) (continuous, more than usual, making a whistling noise when breathing, not related to other known causes e.g. asthma, COPD)
  • Shortness of breath (out of breath, unable to breathe deeply, not related to other known causes or conditions e.g. asthma)
  • Decrease or loss of taste or smell (not related to seasonal allergies or other known causes or conditions e.g. neurological disorders)

Other symptoms of COVID-19 in adults (>18 years old) can include:

  • Extreme tiredness (unusual, fatigue, lack of energy, general feeling of being unwell, not related to getting a COVID-19 vaccine in the past 24 hours, not related to other known causes or conditions e.g. depression, thyroid dysfunction)
  • Muscle aches and/or joint pain (unusual, long-lasting, not related to getting a COVID-19 vaccine in the past 24 hours, and not related to other known causes or conditions e.g. fibromyalgia)

Other symptoms of COVID-19 in children (<18 years old) can include:

  • Nausea, vomiting and/or diarrhea (not related to other known causes or conditions e.g. transient vomiting due to anxiety in children, chronic vestibular dysfunction, irritable bowel syndrome, inflammatory bowel disease, side effect of medication)

If you have any of these symptoms, even if mild, self-isolate and call the Assessment Centre nearest you or Telehealth Ontario at 1-866-797-0000. 

Visit the Child with Symptoms & When to Return page for information on what to do if you child has any of the above symptoms.

High-Risk Contacts

There is specific guidance, including other symptoms to monitor for, that applies to high-risk contacts of COVID-19. If you or your child have been identified as a high-risk contact, please see the Important Information for High-Risk Contacts of COVID-19 page for further details.


Screen daily for COVID-19.

Screening is one of the infection prevention measures that can help slow the spread of COVID-19. It's important to screen yourself, and any children in your care, for symptoms and other risk factors before child care, school, work, sports, and other activities in the community. See below for links to some of the screening tools available. Check with the organization you are involved with for details on their preferred or required tool.


If you have questions specific to COVID-19, call TBDHU at (807) 625-5900 or Toll-Free 1-888-294-6630. You can also send us a message using the Contact Us form.

Last Updated: 08/10/2021