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The flu is a contagious infection of the nose, throat, and lungs caused by the influenza virus. |
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Flu
The flu is a contagious infection of the nose, throat, and lungs caused by the influenza virus.
The flu is a contagious infection of the nose, throat, and lungs caused by the influenza virus. 
Common Cold
The common cold generally involves a runny nose, nasal congestion, and sneezing. You may also have a sore throat, cough, headache, or other symptoms. Over 200 viruses can cause a cold.
The common cold generally involves a runny nose, nasal congestion, and sneezing. You may also have a sore throat, cough, headache, or other symptoms. Over 200 viruses can cause a cold. Topics
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