G Baird, A Pickles, E Simonoff, et al. Measles vaccination and antibody response in autism spectrum disorders. Arch Dis Child 2008;93:832–7. In the Participants section of the Methods the paragraph starting “After consent had been obtained” should read that the SD for the ages is 0.88 (not 88). In table 1, last column heading should be “Narrow autism (n  =  32)” (not 3232).