Coughing Young Girl --- Image by © Bloomimage/Corbis

Cold and Flu Season Center 

Learn about symptoms, treatment, and prevention of colds and the flu during the fall and winter months, their busiest time of the year.

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Infectious Disease Center 

What is an infectious disease? Learn about diseases caused by bacteria, how long pink eye is contagious, how you get MRSA, and much more.

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What Is Pneumonia? 

What is pneumonia? When air sacs in your lungs fill with fluid, you have pneumonia, usually a complication of the flu. Severe cases can be life-threatening.

Girl with head cold, mother caressing forehead --- Image by © Laurence Mouton/PhotoAlto/Corbis

Symptoms of a Cold 

Symptoms of a cold appear 1 to 3 days after exposure to a virus and vary from person to person. Here's a list of cold symptoms and solutions.

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What Is the Flu? 

What the flu is may surprise you. It’s not one single virus. There are several types and frequent mutations. That’s why you need to get a flu shot every year.

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Symptoms of the Flu 

The flu can be a mild to severe illness. It a contagious respiratory illness caused by flu viruses. Learn more about the symptoms of the flu here.

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What Is Strep Throat? 

What is strep throat? About a third of children with a sore throat have a strep infection. The condition usually occurs between the ages of five and 15.

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Where Germs Hide 

Neckties and handbags carry more microbes than you might guess. Ditto your smartphone and keyboard. Here's what you should know about where germs can hide.

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Home Remedies for Coughing 

Try these home remedies for coughing. You probably have many of them in your kitchen. They are designed to soothe that nagging and persistent cough.