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Letters
June 13, 2001

MMR Immunization and Autism—Reply

JAMA. 2001;285(22):2852-2853. doi:10.1001/jama.285.22.2852

In Reply: We agree with Drs Edwardes and Baltzan that temporal ecological correlations are not strong evidence, as we stated in our article. However, repeated calls from parents and health care providers convinced us that the suggestion of such a temporal correlation and possible causal relationship between MMR vaccine use and autism occurrence1 had created great concern and that a more detailed examination and presentation of the data was needed.

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