Parents in the US and other societies are increasingly refusing to vaccinate their children, even though popular anti-vaccine myths - e.g. 'vaccines cause autism' - have been debunked. This book explains the epistemic and moral failures that lead some parents to refuse to vaccinate their children. First, some parents have good reasons not to defer to the expertise of physicians, and to rely instead upon their own judgments about how to care for their children. Unfortunately, epistemic self-reliance systematically distorts beliefs in areas of inquiry in which expertise is required (like...