Walking pneumonia is a mild form of pneumonia. Children with walking pneumonia may feel very tired and run down. But they may still be able to do many of their normal daily activities.

Detailed information on the most common types of warts, including foot warts, flat warts, genital warts, and filiform warts

Warts on the skin are harmless growths. They are caused by a virus. Warts can spread to other parts of the body and to other people.

West Nile fever is an illness caused by a virus. The virus is spread by mosquito bites. It often causes mild, flu-like symptoms.

The West Nile virus is spread by mosquitoes. The West Nile virus can infect humans, birds, mosquitoes, horses, and some other mammals. West Nile virus is spread to humans through the bite of an infected female mosquito. 

Whiplash means your neck was bent forcibly forward and then backward, or vice versa.

Whooping cough (pertussis) is a contagious illness. It causes intense fits (paroxysms) of coughing. It mainly affects babies and young children.

Wilms tumor is a cancerous tumor that starts in the cells of the kidney. It’s the most common type of kidney cancer in children.

Wilson disease is a rare genetic disorder that is passed from parents to children (inherited). It prevents your body from getting rid of extra copper in your system.

Wolff-Parkinson-White syndrome (WPW) is a type of abnormal heartbeat. If you have WPW, you may have episodes of tachycardia, when your heart beats very rapidly

You may get occupational asthma by breathing in irritants at work. The symptoms may go away when you are not at work. But long-term exposure can cause lasting damage.

If you have wrist arthritis with no relief from pain, you may need an artificial joint. Learn what to expect from this wrist surgery.