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.
Autoimmune diseases can affect anyone, but women are at greater risk. These diseases also share common symptoms: severe tiredness (fatigue), dizziness, and low-grade fever. Test your knowledge of this serious—and mysterious—class of diseases.