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Video: 3 things you didn't know about cold sores
Cold sores on the lips can be embarrassing and tough to hide. Most people who are infected with the virus that causes cold sores never develop symptoms.
Video: An asthma attack
What happens to your airways during an asthma attack?
Video: Heart and circulatory system
Watch this video to see how a healthy heart works.
Video: How cancer spreads
Watch this video to see how cancer spreads (metastasizes).
Video: Keratoconus
Scleral contact lenses may be an alternative to surgery for many patients with keratoconus.
Video: Melanoma — Early stage and advanced melanoma
Melanoma — Video explains early-stage melanoma and advanced melanoma.
Video: Ovulation
Ovulation — the release of an egg from an ovary — occurs about midway through the menstrual cycle. See how it happens.
Video: Rotator cuff damage
See how your rotator cuff can become damaged.
Von Willebrand disease
Learn more about the symptoms, causes, diagnosis, treatment of this inherited bleeding disorder in which blood doesn't clot well.
Walking pneumonia: What does it mean?
Walking pneumonia is a mild bacterial infection that resembles a cold. It usually does not require bed rest or a hospital stay.
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