This case study highlighting one possible form regressive autism in 33 months old following upper respiratory tract infection was published this month by Canadian university. The doctors were to test, address and reverse the auto antibodies (here NMDA receptor ones but there are several other auto antibodies reported in ASD) using IVIG and steroids.

http://www.ncbi.nlm.nih.gov/pubmed/24092894

We haven't tested or considered this as we likely don't have regressive ASD. Though there are… read more