Brooks Kraft/Getty Images Twitter removed a message by Rudy Giuliani and temporarily locked his account for sharing coronavirus misinformation. In the tweet, Giulaini quoted conspiracy theorist and conservative activist Charlie Kirk promoting anti-malaria drug hydroxychloroquine as a coronavirus cure. Tests have not established that hydroxychloroquine is a safe or effective cure for the virus. Visit Business Insider's homepage for more stories. Twitter removed a message by Rudy Giuliani, President Donald Trump's personal attorney, for spreading misinformation about the coronavirus and making groundless attacks on Michigan Governor Gretchen Whitmer.