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How Long Is Pink Eye Contagious? 

Also known as conjunctivitis, pink eye is a common condition, spreads easily, and is simple to treat. Learn what pink eye is and how long it is contagious.

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What is C. diff?  

When people ask, “What is C. diff?” they are really asking two questions: One: What is the illness like and, two, what causes it. Learn more.

What Do You Know About Tuberculosis?

Many people think tuberculosis (TB) is no longer a threat, but it's still a leading killer worldwide. One-third of the world’s population (about 2 billion people) are infected with the bacteria that cause TB.

1. How do you get TB?
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Tuberculosis is a disease that can affect any part of the body, but the infection most often targets the lungs. Most TB cases are caused by inhaling the bacteria. People can get TB when an infected person coughs, sneezes, speaks, sings, or laughs. Tuberculosis has been around for thousands of years, but it did not become a major health problem until the Industrial Revolution. Crowded living conditions helped it spread. In the 17th and 18th centuries, TB caused a quarter of all adult deaths in Europe. Only the active form of the disease is contagious. Some people have inactive TB, or latent TB. This can't be spread to other people unless it becomes activated for some reason.
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How Do You Get Cellulitis? 

Cellulitis causes pain, blindness, even death. How do you get cellulitis? Find out your risk and how to treat this skin dangerous infection.

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Symptoms of Sinus Infection 

Is it a cold or sinus infection? Learn the symptoms of sinus infection, whether you need antibiotics, and which home remedies are effective.

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How Long Is Mono Contagious?  

Mono virus lasts in saliva for up to 18 months after your symptoms ease up, but it’s impossible to know exactly how long mono is contagious.

Learn About Zika Virus 

It's not just bites from Zika-carrying mosquitoes that result in the infection. Humans can spread the virus, too.