Sander van der Linden, a psychologist at the University of Cambridge, explores how to immunize people against fake news. His research started with climate change misinformation and has evolved into creating experiments and educational tools, including videos and video games, to help individuals better recognize and resist manipulative information. By using principles similar to vaccination, van der Linden demonstrates that people can develop cognitive ‘antibodies’ against falsehoods, aiming to make the public more resilient against the spread of disinformation.