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Shigella infection
Shigella infection is an intestinal infection that causes diarrhea. Learn how to recognize, treat and prevent the spread of this contagious condition.
Seizures
Learn about the different types of seizures and what causes them. Also find out what to do if you see someone having a seizure.
Scorpion sting
Scorpion stings are painful but rarely life-threatening. Young children and older adults are most at risk of serious complications.
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.
SVT ablation
Discover how cold or heat energy is used to correct fast and erratic heartbeats, such as atrial tachycardia and AV node reentrant tachycardia.
Ruptured eardrum (perforated eardrum)
A ruptured eardrum is a hole or tear in your eardrum, the thin tissue that separates your ear canal from your middle ear.
Rubella
Learn more about the symptoms and prevention of this contagious viral infection best known for its distinctive red rash.
Rotavirus
Learn more about this common childhood condition that causes fever, vomiting, diarrhea and sometimes abdominal pain.
Reye's syndrome
Learn more about the causes and treatment of Reye's syndrome, a rare but serious condition causing swelling in the liver and brain.
Respiratory syncytial virus (RSV)
This common illness affects the lungs. It can seem like a cold, but may be severe, especially in children. Know the symptoms and treatment.
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