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Learning Center
Hepatitis A
This contagious liver infection is caused by a virus. Learn more about its symptoms, treatment and prevention, including the hepatitis A vaccine.
X-linked agammaglobulinemia
This genetic disease weakens the immune system, mainly in males, and leads to having infections often.
Premature ejaculation
Understand what may cause ejaculation to happen earlier than wanted during sex. Also learn how to treat and prevent it.
Peripheral nerve tumors
Learn about these growths that form in or near nerves connecting to the spinal cord. Surgery is the most common treatment.
Mosquito bites
Learn about the many ways to prevent mosquito bites and how to ease the itch if you are bitten.
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