> Until recently, ideas about what causes autism have been vague, and this sense of uncertainty has allowed misinformation to escalate. ... Autism is genetic.

> Until recently, ideas about what causes autism have been vague, and this sense of uncertainty has allowed misinformation to escalate. ... Autism is genetic. You’re born autistic and you’re autistic for life. Most autistic people are autistic because of genes they got from their parents. This is why autism often runs in families. Much less commonly, other factors can play a role, but usually in combination with genes from parents. Psst, words like "most", "often", and "usually" aren't helping your "vague" problem.