Fitness basics
Learning Center
What's the difference between H1N1 flu and influenza A?
H1N1 flu is a subcategory of influenza A.
White coat hypertension: When blood pressure rises in a medical setting
Blood pressure that measures high during a health checkup could be a risk factor for high blood pressure. Find out more.
Whooping cough
Learn more about the symptoms, causes, treatment of this highly contagious, vaccine-preventable lung infection.
Winter blahs? 4 pro tips to get you off the couch.
Struggling to stay active in winter? We've got you covered with some inside tips and strategies that'll help you keep moving.
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.
Wisdom tooth removal
If you don't have enough room in your mouth for wisdom teeth, or they're painful, infected or cause other dental problems, they may need to be removed.
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.
X-linked agammaglobulinemia
This genetic disease weakens the immune system, mainly in males, and leads to having infections often.
Xylazine
Xylazine is a medicine used to sedate animals. Learn about possible risk of death in humans who take it.
Yeast infection in men: How can I tell if I have one?
Yeast infections can occur in men, causing inflammation of the penis (balanitis). Learn what signs and symptoms could mean you have a yeast infection.
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