Correct citation: Woods JS, Armel SE, Fulton DI, Allen J, Wessels K, Simmonds PL, Granpeesheh D, Mumper E, Bradstreet JJ, Echeverria D, Heyer NJ, Rooney JP. 2010 Urinary porphyrin excretion in neurotypical and autistic children. Environ Health Perspect. 2010 Oct;118(10):1450-7. doi: 10.1289/ehp.0901713. Epub 2010 Jun 24.
It is an article of belief in some circles that urinary porphyrin excretion abnormalities is a biomarker for autism. However, the foundations of that belief rest upon studies performed by the disgraced and discredited Geier family (father and son).
The above article does not mention vaccines.