Take a look at the influenza virus under a microscope, and you'll see a funny-looking spiked ball. But if you've ever been flat on your back with the flu, you know there's nothing funny about this highly contagious virus. Test your savvy by taking this quiz.

Smoking is the main cause of chronic obstructive pulmonary disease (COPD), a serious, debilitating and often fatal illness. Take this quiz to find out more about COPD and how to prevent it.

Do you know your risk factors for high blood pressure? You can’t do anything about some risk factors. But other risk factors can be changed. Learn about the risk factors for high blood pressure by taking this quiz.

Find out how much you know about the newest dietary guidelines and how they differ from the old food pyramid.

True or false: Studies suggest that people who consume lots of antioxidants (vitamin C, vitamin A, and carotenoids) from food sources have a lower cancer risk.

Happy New Year! It’s time to look ahead to the next 12 months and see what you can do to maintain or improve your health. Do you need to lose weight? Quit smoking? Start exercising?

True or false: Polio vaccines should be kept up-to-date throughout your lifetime.

True or false: Heat-related illness is only a concern if the temperature reaches 100 degrees F.

Heart-attack deaths have fallen 60 percent in four decades. Still, millions of Americans suffer from cardiovascular diseases linked with heart attacks and strokes.

Knowing what causes heart disease and how you can prevent it can help you live a healthier, longer life.