As Donald Trump uses the platform of the presidency to promote unproven ties between Tylenol, vaccines and autism without giving new evidence, Alex Hannaford looks at the rise of Robert F Kennedy Jr’s ‘Maha’ movement and why some of its wild claims rooted in conspiracy theories could be devastating

Donald Trump trails ‘answer’ to condition at memorial service for Charlie Kirk

RFK Jr has pushed a discredited theory that routine vaccinations are responsible for the rise in the diagnosis