Viral Infections

  • Colds and flu are both caused by viruses.

  • The most common way to catch a cold or the flu is through contact with an infected person.

  • The average adult has an estimated 2 to 4 colds every year.

  • Cold symptoms usually clear up within about a week; flu symptoms tend to last for 1 to 2 weeks.

  • Viruses can cause yellow or green mucus drainage.

  • Antibiotics are not effective against viral infections such as colds and flu; treating symptoms with OTC medication is a better option.

Preventing Colds And Flu

  • Wash your hands frequently.

  • Avoid close contact with people who have a cold or the flu.

  • Avoid touching your nose, eyes, and mouth.

  • Cover your nose and mouth when you cough or sneeze.

Cold vs Flu
How To Tell The Difference


When symptoms start, it can be hard to tell whether you have a cold or the flu. However, a few distinctive signs of each illness can help you tell them apart (see table below).

Symptoms Cold Flu
Fever Rare Common, usually 102-104 degrees F, lasts 3 to 4 days
Headache Rare Common
Body Aches Mild Common, often severe
Fatigue, Weakness Mild Common, severe early on, can last 2 to 3 weeks
Stuffy nose Common Sometimes
Sneezing Common Sometimes
Sore Throat Common Sometimes
Cough, Chest Discomfort Mild to moderate hacking cough Common, can become severe
Mark S. Brown, MD, FACS
David A. Clark,
MD, FACS
Steven H.
Dennis, MD
R. Glen Medders
MD, FACS
H. Craig Price, MD
Jeevan B.
Ramakrishnan, MD
Stanley A.
Wilkins, Jr, MD
 
 

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