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Illness comparison chart

Learn about the differences between COVID-19, influenza, common cold, and gastrointestinal illness (GI).
ON THIS PAGE:

Overview

COVID-19 Influenza Common Cold GI Illness
Virus SARS-CoV-2 Influenza virus A or B Many viruses Norovirus (most common)
Immunization COVID-19 vaccine Influenza vaccine No vaccine No vaccine
Onset Gradual Sudden Gradual Sudden

Symptoms*

COVID-19 Influenza Cold GI Illness
Fever
Chills
Fatigue
Cough
Sneezing
Aches and pains
Runny and stuffy nose
Sore throat
Diarrhea
Children only
Nausea/Vomiting
Children only
Headache
Shortness of breath
Loss of smell or taste

*You may not have all of these symptoms. Symptoms may be different for everyone.

Current as of: February 25, 2025
Sources: Communicable Disease Control, Alberta Health Services

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