"their expertise" is a TikTok video posted by capwithoutacountry on 5 July 2021.
Transcript[]
Stitch with @beckettla: "There is no credible evidence linking vaccines to autism–."
"Okay, but hear me out: if there were, and I've already been diagnosed with Aspergers, then would taking the COVID19 vaccine enable me to level up? And if so: which version of the vaccine would give me the greatest increase in CP?"