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| | ==Tags: #autism #study #mmr-vaccine==
Study compared observed rise in reported autism incidences in California verses increase in MMR coverage from 1980-1994. However, the numbers representing the increase in autism cases may not truly represent a rise in cases as the system reporting these numbers was expanding, definitions of autism were changing, etc. See conclusion of the report.
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Brief Report | March 7, 2001
Time Trends in Autism and in MMR Immunization Coverage in California FREE
Loring Dales, MD; Sandra Jo Hammer, RN, PHN; Natalie J. Smith, MD, MPH
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JAMA. 2001;285(9):1183-1185. doi:10.1001/jama.285.9.1183.
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Figure. Percentage of Children Receiving Measles-Mumps-Rubella (MMR) Immunization in Second Year of Life and Caseload of Children With Autism, by Year of Birth, California, 1980-1994
The upper 2 curves indicate the percentages of children receiving MMR immunization by 17 and 24 months of age, respectively. The lower curve indicates the number of cases of children with autism2 (and California Department of Development Services, unpublished data, 2000). The vertical dotted line at birth year 1988 is provided as a temporal reference point in comparing the shapes of these curves.
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