https://www.theguardian.com/us-news/2020/jul/28/donald-trump-jr-twitter-restricted-hydroxychloroquine

President’s son had shared a viral video published by Breitbart that contained false claims about hydroxychloroquine

Twitter limited some of Donald Trump Jr’s account features on Tuesday, after the president’s eldest son shared false claims about the anti-malaria drug hydroxychloroquine as a coronavirus treatment.