https://www.cdc.gov/flu/consumer/symptoms.htm
| Signs and Symptoms | [Flu] Influenza | Cold |
|---|---|---|
| Symptom onset | Abrupt | Gradual |
| Fever | Usual; lasts 3-4 days | Rare |
| Aches | Usual; often severe | Slight |
| Chills | Fairly common | Uncommon |
| Fatigue, weakness | Usual | Sometimes |
| Sneezing | Sometimes | Common |
| Stuffy nose | Sometimes | Common |
| Sore throat | Sometimes | Common |
| Chest discomfort, cough | Common; can be severe | Mild to moderate; hacking cough |
| Headache | Common | Rare |
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