Why winter illnesses increase
In Ontario, respiratory viruses circulate more actively during late fall and winter. Flu, RSV, and COVID-19 can share similar symptoms, which makes it difficult for patients to know when medical care is needed.
Understanding warning signs helps you decide when to seek care.
Common symptoms to watch for
Symptoms of respiratory illness may include:
- fever or chills
- cough or sore throat
- fatigue or body aches
- shortness of breath
Symptoms can range from mild to severe.
When to see a doctor
You should consider seeing a doctor if:
- symptoms last more than a few days
- fever remains high or persistent
- breathing becomes difficult
- symptoms worsen instead of improve
Children, older adults, and people with chronic conditions should seek care earlier.
When emergency care is needed
Seek emergency care if there is:
- severe shortness of breath
- chest pain
- confusion or loss of consciousness
- bluish lips or face
Final takeaway
Winter respiratory illnesses are common, but knowing when to seek care can prevent complications and unnecessary emergency visits.



