As more and more parents choose to skip vaccinations for their children, public health professionals and researchers have been looking at new ways to ease the concerns of parents who are hesitant. But that turns out to be tough to do. Studies have found that simply educating parents about the safety and efficacy of vaccines doesn't increase the likelihood that they will get children vaccinated. Since numerous studies show that doctors are the most trusted communicators of information about vaccines, the Group Health Research Institute in Seattle wanted to see if it would help to train doctors and other providers on how they communicate with mothers hesitant about vaccines.