COLD & FLU BASICS
Cold & Flu Causes
Cold
The common cold is a viral infection that affects your upper respiratory tract (nose and throat). It’s generally not considered serious, and most people recover within a week or two. There are many viruses that can cause the common cold.
Flu
The flu is a viral infection caused by the influenza virus that affects your entire respiratory system—nose, throat, and lungs. Since these viruses constantly change, even if you’ve had the flu in the past, your body might be susceptible to a new strain this year.
Cold
Compare Cold & Flu Symptoms
Flu
Rare
Fever
Common
Mild
Fatigue
Moderate to severe
Rare
Chills
Common
Slight
Body aches
Common and often severe
Less common
Headaches
Common
Common
Stuffy nose
Less common
Common
Sore throat pain
Less common
Common
Cough
More Common
A hacking cough that brings up mucus
What type?
A cough that gets more wet within progression
Mild to moderate
Chest Congestion
Often severe
How Long Will You Be Contagious with Cold & Flu?
Cold
You are most contagious for the first 2 or 3 days after symptoms first appear. However, symptoms may continue to linger.
Flu
You are most contagious for the first 1 or 2 days before symptoms first appear and 5 to 7 days after symptoms develop.
The Bottom Line On Cold & Flu
Cold
Cold symptoms are generally less severe than those associated with the flu and develop gradually.
Flu
Flu symptoms develop quickly and can range from mild to severe, and may sometimes lead to pneumonia, bronchitis, and ear infections.
