This research paper consists of various information from four published articles found on the Internet regarding whether or not the MMR vaccine causes autism in children. According to the article MMR Vaccine (2010) in Black's Medical Dictionary, 42nd Edition, several studies and experiments have been conducted and to date there is no direct link between the MMR vaccine and autism. Other researchers such as Robert M. Youngson (2004, 2005), who wrote in the Collins Dictionary of Medicine that: “No association has been demonstrated between autism and the use of the MMR vaccine.” (Youngson, 2004) An editorial by Stephen I. Pelton, published on March 15, 2010, in the Family Practice News Magazine stated that he was happy that THE LANCET had taken up the article written by Dr. Andrew J. Wakefield in 1998, which explained a relationship between the MMR vaccine and autism. According to Michelle Meadows, author of an IOM report titled “No Link Between Vaccines and Autism,” the evidence has not shown an association between the MMR vaccine and autism. (Meadows, 2004) Word Bank: MMR: measles, mumps, rubella Doctor: Doctor IOM: Institute of Medicine Controversy between MMR vaccination and the possibility of causing autism in children. Many authors have conducted research and experiments to prove the point that there is no direct link between the MMR vaccine and autism. Newspapers, magazines, books, encyclopedias and dictionaries all contain articles written by authors who suggest that there are links and relationships between the MMR vaccine and autism and then there are many who say there is no link. In order to fully understand the meaning of the vaccine, the uses, ...... at the center of the paper ...... like Robert M. Youngson (2004, 2005) who wrote in the Collins Dictionary of Medicine that: “Not no association has been demonstrated between autism and the use of the MMR vaccine.” (Youngson, 2004) An editorial by Stephen I. Pelton, published on March 15, 2010, in the Family Practice News Magazine stated that he was happy that "THE LANCET" had taken up the article written by Dr. Andrew J. Wakefield in 1998, which explained a relationship between the MMR vaccine and autism. According to Michelle Meadows, author of an IOM report titled “No Link Between Vaccines and Autism,” the evidence has not shown an association between the MMR vaccine and autism. (Meadows, 2004) To summarize, PARENTS do not feel misinformed. The combination of measles, mumps, and rubella vaccines does not cause autism, nor does the preservative additive thimerosal cause autism.