Fitness basics
Learning Center
Trachoma
Trachoma is the leading preventable cause of blindness worldwide. Find out about symptoms, treatment and prevention of this serious eye disease.
Traumatic brain injury
If a head injury causes a mild traumatic brain injury, long-term problems are rare. But a severe injury can mean significant problems.
Viral gastroenteritis (stomach flu)
This condition, often called stomach flu, is usually harmless, except for infants and people with immunosuppression. Symptoms can usually be managed.
Sarcoma
Learn about this cancer that forms in the bones and the connective tissue. Find out about symptoms, diagnosis, treatment and the many types of sarcoma.
Coronavirus disease 2019 (COVID-19)
Coronavirus disease 2019 (COVID-19) is an illness caused by the virus SARS-CoV-2. Learn more about the symptoms, risks and ways to protect yourself.
Acute flaccid myelitis (AFM)
Know the possible symptoms of acute flaccid myelitis (AFM), a rare but serious condition that affects young children.
Multisystem inflammatory syndrome in children (MIS-C) and COVID-19
Learn about symptoms of MIS-C, a serious condition linked to coronavirus disease 2019 (COVID-19). Get help fast if your child shows any signs.
Congenital myasthenic syndromes
These rare hereditary conditions result in a problem in nerve stimulation, causing muscle weakness that worsens with physical activity.
Hip dysplasia
In infancy, this condition often can be corrected with a soft brace. Older children and young adults might require surgery to correct the misalignment.
Transposition of the great arteries
This serious, rare heart problem present at birth requires surgery to correct. Learn about its symptoms and treatment.
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