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In December 2019, a novel coronavirus started an outbreak which led to a pandemic. Later, this novel coronavirus became known as COVID-19. As cases of infection rose globally, public health measures were taken to reduce the spread and harm from infection, including physical distancing, masking, and vaccination. While the strategies work better together, vaccination is still the most effective protection against severe COVID-19.
Although pandemic restrictions have been lifted, COVID-19 still exists worldwide, with new variants meaning cases and outbreaks still occur, and often come in waves throughout the year. COVID-19 infections increase in the fall each year, when other respiratory illnesses, like the flu and Respiratory Syncytial Virus (RSV) also increase. If you have symptoms of any respiratory viral infection, take the Ontario Ministry of Health’s COVID-19 Self-Assessment for recommendations on what to do next. For more information, visit the Provincial website.
Health care providers can find more information about COVID-19 on our COVID-19 Information for Health Professionals webpage.
Learn more about COVID-19 vaccines.
Like other respiratory viruses, COVID-19 is spread by:
Using layers of protection can prevent the spread of respiratory viruses.
COVID-19 and other respiratory viruses share common symptoms, including:
Other symptoms characteristic of COVID-19 infection include:
Long COVID, or post-COVID-19 condition (PCC), occurs when symptoms or health issues persist for three or more months after a COVID-19 infection, without another explanation. Individuals with long COVID are no longer contagious. While anyone who contracts COVID-19 can develop long COVID, it is more common in adults, especially women and those with pre-existing conditions, though children can also be affected. The risk increases for those who were hospitalized but can also occur after mild or asymptomatic cases. Repeated COVID-19 infections may further raise the risk.
Symptoms of long COVID can be different for everyone, and can change over time, but common symptoms include:
The best way to prevent long COVID is to avoid infection and getting vaccinated. Studies show that people who are vaccinated with two or more doses are less likely to get long COVID and that getting vaccinated continues to protect people even after having a COVID-19 infection.
Newer research is showing that antiviral treatment taken at the beginning of a COVID-19 infection may also lower the risk of getting long COVID. See the “Diagnosis & Treatment” tab below for more information.
If you have symptoms, stay home (self-isolate) whether you have tested or not. Follow provincial guidance on isolation duration and masking. Notify close contacts, especially if they are high risk for getting very sick from a COVID-19 infection. Stay home until you are fever-free and symptoms are improving for at least 24 hours (or 48 hours if you have gastrointestinal symptoms such as vomiting and/or diarrhea). After isolating:
Breastfeeding (also known as chest feeding) your baby is recommended even if you have COVID-19. This is because breast milk has many health benefits for babies, including protection from different illnesses.
If you have COVID-19 and are breastfeeding, you should:
If your symptoms feel worse than a common cold, call your health care practitioner or call Health811.
If you have ANY of the following signs of severe illness, you should seek immediate medical attention:
If you do not feel well enough to take personal transport, call 911. Before going for in-person medical care, tell them that you likely have COVID-19.
The following infants and children should also be assessed in the emergency department:
Rarely, children can get an inflammatory condition that impacts the blood vessels, called vasculitis. This condition presents prolonged fever, abdominal pain, red eyes, nausea, vomiting, diarrhea, and rash. It needs medical attention.
Getting COVID-19 while you are pregnant puts you at higher risk of getting very sick and being hospitalized. It may increase the following risks:
If you are pregnant and have symptoms of COVID-19 or have tested positive, speak to your healthcare provider as soon as possible to find out if you are eligible for treatment.
Talk with a health care provider who can assess you and review your symptoms if you think you have Long COVID. There is currently no specific treatment for Long COVID, but a health care provider can give you advice and support on how to manage your symptoms.
COVID-19 is diagnosed with laboratory tests using a sample collected from the nose or throat by a health care professional or another trained individual. The laboratory will process these tests to determine if a person has the COVID-19 virus.
Visit the Ministry of Health’s website to find out if you are eligible for COVID-19 testing and treatment including where the nearest clinical assessment centre near you is located and how to get your test results. COVID-19 testing is not provided by Toronto Public Health.
With PCR testing, a health care professional, or another trained individual, swabs your nose or throat, they send the sample to a lab for testing, and you typically get the results in 1 to 2 days. Some participating pharmacies are also providing self-collection kits for COVID-19 PCR testing. These allow you to collect the sample on your own (under supervision on-site or by yourself at home), then return it to the testing location for processing by a lab.
Rapid Antigen Tests use samples from the nose, cheek, throat, or tongue and provide results in a few minutes. A positive result likely indicates COVID-19, but a single negative result doesn’t rule it out. If you have COVID-19 symptoms and two rapid antigen tests, separated by 24 to 48 hours, are both negative, it is less likely you have a COVID-19 infection. Self-isolate until you no longer have fever and your symptoms are improving for at least 24 hours (or 48 hours if gastrointestinal symptoms such as vomiting and/or diarrhea).
Toronto Public Health is no longer ordering or distributing rapid antigen test kits. Residents continue to have access to these tests at a number of pharmacies across Toronto, and high-risk individuals will be provided kits through the Ministry of Health through existing channels.
Treatment is available for high-risk individuals to lower the risk of serious illness and hospitalization due to COVID-19 infection.
Find out if you are eligible for treatment.
If you are eligible for treatment and start to have COVID-19 symptoms (even if mild) or have tested positive, talk to your health care provider as soon as possible. Do not wait for your symptoms to get worse. To be most effective, COVID-19 medications need to be taken within five to seven days of your symptoms starting. Your health care provider will prescribe treatment and direct you to a local pharmacy to receive it.
If your symptoms are severe, such as difficulty breathing or chest pain, call 911.
If you are caring for or living with someone who has COVID-19:
If you have been told that you are a close contact, you do not need to self-isolate (stay home), unless you develop symptoms. For a total of 10 days from the last day you saw the person with COVID-19 you should:
If you are a close contact who lives in a high-risk setting (e.g. long-term care, or other congregate setting), you may need to self-isolate.
If you are a close contact who works/volunteers/attends a high-risk setting, and do not have any symptoms of COVID-19, you can continue to work while self-monitoring for symptoms for 10 days from your last exposure to the person with COVID-19. Speak to your employer and follow any additional workplace measures.
After self-monitoring, Toronto Public Health recommends continuing preventive measures, such as handwashing and physical distancing. Wearing a well-fitted, high-quality mask in crowded or poorly ventilated indoor public spaces is recommended, especially around high-risk individuals like seniors or those with weakened immune systems. Masks are especially recommended for people at higher risk of getting seriously sick from COVID-19. Masks are still required in some settings.