Symptoms of the common cold and influenza (flu) are similar. However, one key symptom of flu is the presence of fever. Other differences are noted in the table below.
Symptom | Influenza | Common Cold |
---|---|---|
Fever | Usual, sudden onset more than 100°F, lasts 3 - 4 days | Rare |
Sore throat | Usual | Usual |
Cough | Dry, sometimes severe | Hacking |
Headache | Usual and can be severe | Rare |
Aches and pains | Usual and can be severe | Rare |
Fatigue and weakness | Usual and can last 2 - 3 weeks, moderate to severe | Sometimes, but mild |
Debilitating fatigue | Usual, early onset can be severe | Never |
Nausea, vomiting, diarrhea | In children younger than 5 years old | Rare |
Watering of the eyes | Rare | Usual |
Runny, stuffy nose | Rare | Usual |
Sneezing | Rare in early stages | Usual |
Chest discomfort | Common, often severe | Sometimes, but mild to moderate |
Complications | Respiratory failure, can worsen a current chronic condition, can be life threatening | Congestion or earache |
Fatalities | Well recognized | Not reported |
Prevention | Influenza vaccine; frequent hand washing; cover your cough | Frequent hand washing; cover your cough |