A Population-Based Study of Measles, Mumps, and Rubella Vaccination and Autism
Kreesten Meldgaard Madsen, M.D., Anders Hviid, M.Sc., Mogens Vestergaard, M.D., Diana Schendel, Ph.D., et al.
Andrew Wakefield wrote to the authors that the mercury is a factor in vaccines that causes autism and they have not taken that into consideration when doing the very large study.
This is the editors respond:
“Dr. Wakefield argues that we should have controlled for mercury exposure from vaccines. However, mercury — or more precisely, the vaccine preservative thimerosal that contains ethyl mercury — has not been used in Danish vaccines since 1992 and thus was not a confounder in the study.”