Walker-Smith is the senior co-author of a fraudulent paper (along with Andrew Wakefield, the lead author) which claimed a unique gastrointestinal condition in autistic children that may be connected to the MMR vaccine. This study is generally regarded as sparking the MMR vaccine controversy.[6]
In 2010, Walker-Smith was found guilty by the General Medical Council of professional misconduct who recommended erasure subject to appeal. As a result, he was barred from practicing medicine.[4][7] On appeal, the case heard by Mr. Justice Mitting in the High Court stated that the GMC determinations were superficial and inadequate and so were quashed.[8]
In a statement reported in the book on the fraud by Brian Deer, Walker-Smith said:
My case was related to entirely different issues to those that concerned Dr. Wakefield... Every investigative procedure I ordered was to find out what was wrong with the children.[9]
^Deer, Brian (2020). The Doctor Who Fooled the World: Science, Deception, and the War on Vaccines. USA: Johns Hopkins University Press. p. 313. ISBN978-1421438009.