How Facebook's stance that it won't ban posts unless they "cause imminent harm", reversed in Feb. 2021, has led people to believe dangerous lies about COVID-19 (Bloomberg)

Bloomberg:
How Facebook's stance that it won't ban posts unless they “cause imminent harm”, reversed in Feb. 2021, has led people to believe dangerous lies about COVID-19  —  Mark Zuckerberg wanted to make his social network a reliable source about the pandemic.