A new United Nations and UNESCO study together with the support of the World Jewish Congress investigates Holocaust denial and distortion on social media, measuring their extent and nature on Facebook, Instagram, Telegram, Twitter and TikTok, at a time when the memory and fundamental facts of the Holocaust are under threat from lies, smears and the spread of violent ideologies. It provides recommendations that governments, online platforms, educators and researchers can implement to counter denial and distortion, prevent antisemitism and uphold human rights