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One in 36 children in the United States has autism , according to the Department of Health and Human Services (HHS) — but many don’t learn they’re on the spectrum until adulthood.

Those who grow up without a diagnosis can experience symptoms that are overlooked or misunderstood.

One in every 45 adults in the U.S. is diagnosed with autism spectrum disorder (ASD), according to Autism Speaks, a national nonprofit for autism awareness.

CANCER DRUG COULD DOUBLE AS AUTISM THERAPY, AND IS POISED FOR FDA APPROVAL

Although there’s a current uptick in autism advocacy and education, there are likely "many adults" who never received a diagnosis or were misdiagnosed, the New Jersey-headquartered organization states on its website.

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