https://www.siliconvalley.com/2020/03/21/twitters-coronavirus-rules-face-new-test-elon-musk/ > Just days after Twitter announced new rules to crack down on tweets spreading misinformation about coronavirus, the company faced a test from a high-profile source: Elon Musk. > On Thursday, Musk, the CEO of Tesla and SpaceX, tweeted the false claim that children are “essentially immune” to the virus. Twitter did nothing.