Gastanaduy PA, et al. - With an intent to assess the impact of public health responses during a measles outbreak in an Amish community in Ohio, researchers quantified measles transmissibility during the 2014 outbreak. To determine outbreak size and duration if containment measures had not been initiated, and the impact of vaccination, a mathematical model was parameterized by early R values. The observed transmission reductions which could not be completely attributed to vaccination were indicative of the importance of changes in community behavior (social distancing) and other control efforts (isolation, quarantining). Overall, these data underscore the benefits of measles outbreak response and of understanding behavior change dynamics.