Whether calculating your target heart rate, assessing your risk for a common condition, or testing your knowledge of today's health concerns, these tools help you manage your health. They are easy to use, informative, and often surprising.
Tetanus is an infection that affects the nervous system. It’s also called lockjaw. Most children are vaccinated against it, but that protection wears off with time. Adults need a booster shot to keep their immunity up to date.