There is nothing more important to me than accuracy, and there is no place in my book, "Denialism," where I tried harder to avoid careless mistakes than in the chapter called "Vaccines and the Great Denial." I didn't succeed, though, and I want to make sure readers are aware of that. In a section describing the origin and workings of the National Vaccine Injury Compensation Program I quote extensively from an article in The New England Journal of Medicine written by Dr. Paul Offit, the well-known vaccine researcher. At one point in my narrative (which begins on page 88 of the book) however, I stopped quoting Dr. Offit in order to explain, in my own words, the meaning of some of the medical terminology he had employed. I then returned to Dr. Offit's description of why the court was created and how it works, and should have gone back to quoting from the NEJM article, but did not. It was an accidental oversight which I will correct as soon as new copies of the book are printed. I told Dr. Offit about the mistake as soon as I realized I had made it, and, as always, he was gracious. But I also wanted to make readers aware of the error, which I regret.