PANDAS is a pediatric disease. Around 69% of the children who contract it are between the ages of four and nine. Another 19% are between 10 and 13 years. However, around 11% of families report children aged one to three exhibiting OCD and tic behaviors following a strep infection. Only 1% of those with PANDAS symptoms are over the age of 14. Physicians have diagnosed more than 500,000 children in the US with OCD. Another 138,000 have Tourette syndrome. Some specialists and researchers believe that children with PANDAS make up about 25% of those diagnoses.

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