Autism, an umbrella term for a spectrum of developmental disorders that can look vastly different from one person to the next, was already a deeply stigmatizing condition for people like Tyler Bunty.

Researchers, clinicians and disability rights advocates are dismayed by RFK Jr.'s new autism study. Many view it as a big ...

Groups advocating for people with the condition are split on Robert F. Kennedy Jr.’s effort to understand why so many more are being diagnosed with it.