caption: FILE - In this Aug. 21, 2018, file photo, a Facebook start page is shown on a smartphone in Surfside, Fla. Facebook says it's working to help limit the spread of misinformation and harmful content about the coronavirus and will focus on providing helpful information to people. <PERSON>, Facebook's head of health, said in a post, Friday, Jan. 31, 2020, that the social media platform's third-party fact-checkers are reviewing content and debunking false claims related to the coronavirus. (AP Photo/ <PERSON>, File)
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