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Tetralogy of Fallot
These four heart problems present at birth change how blood flows through the body. Know the symptoms and treatment.
Tay-Sachs disease
This rare, inherited disease causes a buildup of fatty acids that damages the brain and typically results in muscle control loss, blindness and paralysis.
Sunburn
Learn more about how UV rays harm your skin and what you can do for symptom sunburn relief and how to protect yourself from sun exposure.
Sudden infant death syndrome (SIDS)
Learn about the unexplained death of a young baby who seems healthy.
Strep throat
Learn more about the symptoms, causes and treatment of this throat bacterial infection in children and adults.
Spina bifida
Learn about this condition in which an unborn baby's spine and spinal cord don't form properly. Surgery during pregnancy may be a treatment option.
Spider bites
Learn more about prevention, symptoms, complications and treatment of spider bites, which are usually harmless.
Sickle cell anemia
Learn about the symptoms, causes and treatment of this inherited blood disorder that, in the United States, is more common among Black people.
Sick sinus syndrome
This heart rhythm disorder causes slow, paused or irregular heartbeats. Learn the symptoms and how it's treated.
Shigella infection
This infection of the intestine causes diarrhea. Learn the symptoms, treatments and ways to help prevent it.
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