Marianna Spring is the BBC's first correspondent specializing in disinformation and social media. She has just published her first book, in which she recounts her experience in the universe of trolls and conspiracy theories.

“Misinformation tends to go viral because we want to believe it,” she says. ‘The first thing I point out is that we live in our own social media worlds, which we have not yet managed to finish dealing with,’ she adds, ‘and we need to learn how to deal with it’