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Tetanus is an infection that affects the nervous system. It's also called lockjaw. Most children are vaccinated against it, but that immunity wears off with time. Adults need a booster shot to maintain their immunity.

True or false: Perishable foods should not be left at room temperature longer than two hours.

Learning about incontinence can give you the courage and understanding needed to bring the subject up with your health care provider.

Cataracts are a common eye problem among older adults.

Answer this one: When should children have their first eye exam?

Answer this one: In most forms of glaucoma, what damages the optic nerve?

Sometimes it's hard to keep your vitamin facts straight. How much vitamin A do you need? What's the best source of Vitamin C? Here's a quiz that offers a chance to learn something different about vitamins.

Answer this one: Lawyers and teachers are particularly susceptible to vocal abuse and misuse problems.

When you're thirsty for a drink of water, you probably turn on the tap, or open a container of bottled water. You may take for granted the quality of the water you drink. but water safety can vary from place to place. Find out more about drinking water by taking this quiz, based on information from the U.S. Environmental Protection Agency.