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Dogs and cats and birds and hamsters. Snakes and guinea pigs and turtles. The family pet can be a source of joy and companionship, no matter what kind of animal it is. Sometimes, however, your favorite animal can be a source of illness. Learn more about pets and disease by taking this multiple-choice quiz.

Bacterial pneumonia kills thousands of older Americans each year. Yet there is a vaccine that offers protection against this deadly illness. How much do you know about pneumonia and the vaccine?

It's fun to take a hike through the woods: listening for songbirds, looking at wildflowers, spying the occasional chipmunk. You also need to keep an eye out for the bane of hikers—poison ivy. Find out how much you know about this annoying plant by taking this true-false quiz.

Houseplants help keep your indoor air clean, make a dramatic statement in your interior design, and provide a sense of well-being around the house. But some plants can poison children or pets.

Poisons can be solids, liquids, sprays, or gases. Learn more about accidental poisonings by taking this quiz.

Prescription medicines can work wonders when they are taken as they should be. But what happens when you miss a dose? Or when you want to take an over-the-counter medicine along with your prescription? See if you know the answers to these and other questions by taking this quiz.

You don't have to be reminded about the aging process. It's inevitable. But just because you're over 50 doesn't mean you can't be fit. Learn more about senior fitness by taking this quiz.

Smallpox was once found throughout the world, causing illness and death wherever it occurred.

The health consequences of using smokeless tobacco include increased heart rate, high blood pressure, irregular heartbeat, and mouth sores.