Similarities in symptoms between flu and COVID-19 include:
- Fever or chills
- Cough
- Shortness of breath
- Fatigue
- Sore throat
- Runny or stuffy nose
- Muscle pain or body aches
- Headache
- Vomiting and diarrhea in some cases
- Change in or loss of taste or smell, though this is more common with COVID-19.
People tend to develop flu symptoms one to four days after infection. COVID-19 symptoms may appear two to 14 days after infection.
