根据美国医学研究所免疫接种安全性审查委员会的报告 ,没有证据提示硫柳汞(用作某些疫苗防腐剂的含汞化合物 )会增加儿童神经发育障碍的危险性。委员会主席 Mc Cormick称 ,现有证据不足以肯定或否定接触疫苗中的硫柳汞与孤独症、注意障碍多动综合征及说话或语言迟缓等神经发育 According to the report of the Immunization Safety Review Committee of the Institute of Medicine, there is no evidence that thiomersal (a mercury-containing compound used as a vaccine preservative) can increase the risk of neurodevelopmental disorders in children. Mc Cormick, chairman of the committee, said there is insufficient evidence available to confirm or deny exposure to thimerosal in vaccines to autism, attention-deficit hyperactivity syndrome, and speech or speech retardation