With millions now vaccinated, Panorama investigates the scare tactics of anti-vaxxers – who are they, and what are their motives for trying to deter people from getting the jab? Reporter Marianna Spring reveals the scale of a social media blitz that has targeted vulnerable people and is now reaching young generations yet to be called for their vaccination. We witness the reaction of a test group exposed to one anti-vax video, all under the watchful eye of one of the UK’s most respected doctors. Will they be influenced by disinformation, or will their plans to be vaccinated remain unchanged?