This: >Looking across U.S. states, we observe a negative association between vaccination uptake rates and online misinformation (Pearson R=–0.49, p<0.001). Investigating covariates known to be associated with vaccine uptake or hesitancy, we find that an increase in the mean amount of online misinformation is significantly associated with a decrease in daily vaccination rates per million ... and combating globohomo disinformation works: >In other words, debunking did not change intentions to vaccinate in general and even backfired among informed people.