Dr Pauline Paterson's (Research Fellow and co-director of The Vaccine Confidence Project, London School of Hygiene & Tropical Medicine) presentation at the CILIP 2017 Conference in Manchester #CILIPConf17 Whilst most people vaccinate, some groups or individuals delay or refuse vaccines due to concerns about safety, whether real or perceived, and concerns about information (including mis-information or mis-trust in information). Public concerns about vaccines have occurred around the world, spreading quickly and sometimes leading to vaccine refusals and disease outbreaks. The presentation will explore case studies on non-vaccination of measles containing vaccine (MCV) and concerns around HPV vaccine globally. This talk will attempt to address the question of how misinformation can undermine public health, exploring selective exposure, selective perception and the issue of multiple realities.