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Chickenpox
Learn more about preventing this once-common childhood illness. Also, find out how to recognize and manage it.
Childhood asthma
The lungs and airways of children with asthma become inflamed, interfering with daily activities. Some children can have dangerous attacks.
Childhood schizophrenia
This severe mental disorder in children involves hallucinations, delusions, and disordered thinking and behavior that can impair the ability to function.
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.
Cyclic vomiting syndrome
Cyclic vomiting syndrome often starts in childhood and is marked by spells of vomiting several times an hour over a period of hours or days.
Dehydration
Dehydration is especially common and dangerous for infants, young children and older adults. Learn more about treating and preventing dehydration.
Desmoplastic small round cell tumors
These rare, aggressive cancers most often form in the abdomen. Learn about DSRCT treatments, including surgery, chemotherapy and radiation therapy.
Diarrhea
Learn more about what causes this common, unpleasant digestive condition, and how you can treat and prevent it.
Diphtheria
This rare but serious bacterial infection can cause organ damage and breathing problems. This disease is often treatable but is also preventable with a vaccine.
Drug addiction (substance use disorder)
Drug addiction affects your brain and behavior to the point where you can't control your use of legal or illegal drugs, even when you know they cause harm.
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