Last spring, as false claims about vaccine safety threatened to undermine the world's response to COVID-19, researchers at Facebook wrote that they could reduce vaccine misinformation by tweaking how vaccine posts show up on users' newsfeeds, or by turning off comments entirely. 15, 2018 file photo, the icons of Facebook and WhatsApp are pictured on an iPhone, in Gelsenkirchen, Germany. Alessandra Tarantino/AP Show More Show Less 5 of9 FILE - In this Nov. Yet despite internal documents showing these changes worked, Facebook was slow to take action. 23, 2018, file photo, doctor Roberto Ieraci vaccinate a woman in a vaccine center in Rome. Alex Brandon/AP Show More Show Lessģ of9 4 of9 FILE - In this Feb. Leo Correa/AP Show More Show Less 2 of9 FILE- In this April 10, 2018, file photo, Facebook CEO Mark Zuckerberg testifies before a joint hearing of the Commerce and Judiciary Committees on Capitol Hill in Washington.
23, 2021, file photo, Oumie Nyassi shows a video circulating on the internet and that has been confirmed as fake news of a woman claiming she was magnetized after receiving the COVID-19 vaccine, in a doctor's office at Serrekunda, Gambia hospital.
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