This eighth and final report of the Immunization Safety Review Committee examines the hypothesis that vaccines, specifically the measles-mumps-rubella (MMR) vaccine and thimerosal-containing vaccines, are causally associated with autism. The committee reviewed the extant published and unpublished epidemiological studies regarding causality and studies of potential biologic mechanisms by which these immunizations might cause autism. Immunization Safety Review: Vaccines and Autism (2004) finds that the body of epidemiological evidence favors rejection of a causal relationship between thimerosal-containing vaccines and autism. Institute of Medicine.
IOM Report Immunization Safety: Vaccines & Autism
Related Resources
2025/2026 State Legislative Sessions Report
This report is a comprehensive review of all proposed, considered, enacted, and vetoed vaccine-related legislation that AIM monitored over the past year.
AIM Legislative Round-up: June 5, 2026
In the final round-up of 2026, AIM is tracking 446 bills since August 1. An overview of legislative movement over the last two weeks is in the PDF.
Connecting the Dots: Legislative Sessions
This guide is designed to equip AIM members and their staff with the necessary tools and information to engage with elected officials appropriately during the legislative session.