Flu usually develops more quickly than a cold, with distinguishing symptoms including;
- Sudden fever - a temperature of 38°C (100.4°F) or above.
- Dry, chesty cough.
- Aching muscles.
- Limb or joint pain.
- Diarrhoea or upset stomach.
- Sore throat.
- Runny or blocked nose.
- Loss of appetite.
- Difficulty sleeping.
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