Mark Zuckerberg has announced he is scrapping fact-checks on Facebook, claiming the labels intended to warn against fake news have "destroyed more trust than they have created". Facebook's fact-checkers have helped debunk hundreds of fake news stories and false rumours however, there have been several high-profile missteps. In 2020, Facebook and Twitter took action to halt the spread of an article by the New York Post based on leaked emails from a laptop belonging to Joe Biden's son, Hunter Biden. As coronavirus spread around the world, suggestions that the vaccine could have been man-made were suppressed by Facebook. An opinion column in the New York Post with the headline: "Don't buy China's story: The coronavirus may have leaked from a lab" was labelled as "false information". In 2021, Facebook lifted its ban on claims the virus could have been "man-made". It was months later that further doubts emerged over the origins of coronavirus. In 2021, Facebook ... was accused of wrongly fact-checking a story about Pfizer's Covid-19 vaccine. A British Medical Journal (BMJ) report, based on whistleblowing, alleged poor clinical practices at a contractor carrying out research for Pfizer. However, Facebook's fact-checkers added a label arguing the story was "missing context" and could "mislead people". Furious debates raged over the effectiveness of masks in preventing the spread of Covid-19. Facebook's fact-checkers were accused of overzealously clamping down on articles that questioned the science behind [mask] mandates.