It is impossible to distinguish between COVID-19 and the flu based solely on symptoms, because they are too alike. A screening test must be performed to identify the presence of COVID-19.
A cold and the flu are respiratory tract infections that are often confused. Colds are more common and milder than the flu. The flu can be very serious.
Symptoms
Flu symptoms and their severity can vary with age and health status.
Comparison of flu and cold symptoms
Symptoms
Flu
Cold
Fever
Common
Temperature between 38 °C and 40 °C (between 100.4 °F and 104 °F)
Sudden onset
Absent or mild
Cough
Common
Sudden onset
Common
Mild or moderate
Headaches
Common
Sometimes severe
Rare
Aches and pains
Common
Sometimes severe
Rare
Mild
Fatigue
Common
Severe
Duration: a few days, sometimes longer
Common
Mild
Nausea and vomiting
Rare in adults
More common in children
Often accompanied by diarrhea and abdominal pain in children
Rare
Mild
Runny or stuffy nose
Rare, more common in children
Common
Sneezing
Rare
Common
Sore throat
Common
Common
If you have symptoms
You can call Info-Santé 811 any time for specific advice about your situation.
If you have flu symptoms, see the Flu (Influenza) page for advice on how to treat yourself.