Skip to content

    Twitter

    Favorites

    Follow Us

    Facebook

    Most Recent

    Follow Us
    Quiz: Which mosquito-borne disease threatens nearly half the world's population?

    You are correct!

    Incorrect

    The correct answer is: Testicular

    Malaria hardly ever happens in the U.S., but nearly half the world's population lives at risk of catching this disease.

    Featured Health Topics

    BRAIN & NERVOUS

    Multiple Sclerosis Facts

    Learn about MS symptoms, possible causes of the disease, and how it attacks the body.

    Symptom Checker

    Take the first step and see what could be causing your symptoms. Then learn about possible next steps.

    Most Common Symptoms

    Newsletters

    Subscribe to free WebMD newsletters.

    • WebMD Daily

      WebMD Daily

      Subscribe to the WebMD Daily, and you'll get today's top health news and trending topics, and the latest and best information from WebMD.

    • Men's Health

      Men's Health

      Subscribe to the Men's Health newsletter for the latest on disease prevention, fitness, sex, nutrition, and more from WebMD.

    • Women's Health

      Women's Health

      Subscribe to the Women's Health newsletter for the latest on disease prevention, fitness, sex, diet, anti-aging, and more from WebMD.

    By clicking Submit, I agree to the WebMD Terms & Conditions & Privacy Policy and understand that I may opt out of WebMD subscriptions at any time.

    WebMD Magazine App

    Health A - Z