Teen health
Learning Center
Wolff-Parkinson-White (WPW) syndrome
This heart condition present at birth causes a fast heartbeat. Rarely, it can cause sudden cardiac death. Know the symptoms and how it's treated.
Withdrawal method (coitus interruptus)
The withdrawal method — pulling the penis out of the vagina before ejaculation — isn't the most effective birth control. Learn about the pros and cons.
Wisdom teeth removal: When is it necessary?
You may not need your wisdom teeth taken out if they're healthy and in the right place. But if they cause problems, your dentist may suggest removing them.
Wilson's disease
This inherited disease causes copper to build up in vital organs, especially the liver, brain and eyes. It's treatable when caught early.
Why isn't there a hepatitis C vaccine?
Hepatitis C vaccine development is far from straightforward, but experimental vaccines are under study.
Whooping cough
Learn more about the symptoms, causes, treatment of this highly contagious, vaccine-preventable lung infection.
Whole-body vibration: An effective workout?
Whole-body vibration — Don't give up regular exercise and a healthy diet.
Whole grains: Hearty options for a healthy diet
Whole grains have been linked to a lower risk of heart disease, diabetes and other health problems. Isn't it time you added more whole grains to your diet?
White tongue
White tongue: Symptom — Learn about the definition and possible causes of this usually harmless symptom.
White stool: Should I be concerned?
White stool may mean a serious liver problem. Learn about causes.
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