Symptoms

Cold

Flu

Fever

Rare in adults and older children. Can be up to 102 F in infants and small children.

Usually 102 F. Can go up to 104 F. Usually lasts 3-4 days.

Headache

Rare

Sudden onset. Can be severe.

Muscle Aches

Mild

Usual. Often severe

Tiredness and Weakness

Mild

Often extreme. Can last 2 or more weeks.

Extreme Exhaustion

Never

Sudden onset. Can be severe.

Runny Nose

Often

Sometimes

Sneezing

Often

Sometimes

Sore Throat

Often

Sometimes

Cough

Mild hacking cough

Usual. Can become severe.