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Learning Center
Bacterial vs. viral infections: How do they differ?
Understand the differences between bacterial and viral infections.
HER2-positive breast cancer: What is it?
HER2-positive breast cancer tends to be more aggressive than other types of breast cancer. Treatments that target HER2 are very effective.
Video: How cancer spreads
Watch this video to see how cancer spreads (metastasizes).
Cervical cysts: Can they be cancerous?
Cervical cysts usually aren't cancerous. Some types of cervical cysts are so common that they're considered a normal feature of cervical anatomy.
Allergies and asthma: They often occur together
Allergies and asthma? Find out how to control both conditions.
Concussion in children: What are the symptoms?
Whether your child's concussion is mild or severe, allow time to recover.
Premenstrual dysphoric disorder: Different from PMS?
Extreme moodiness, intense sadness or marked irritability in the days before your period — along with your usual PMS symptoms — could be PMDD.
How you hear
Your ears enable you to gather and interpret sounds from the world around you.
How your brain works
Which part of your brain does what? Take a tour.
Mayo Clinic Minute: Demystifying epilepsy
Epilepsy is a fairly common condition, but seizures can usually be controlled with medications.
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