Tesla Inc. Chief Executive Elon Musk, who has repeatedly played down the risk of the coronavirus since early in the pandemic, says he tested both positive and negative for Covid-19 on Wednesday and raised questions about the validity of such testing more broadly.
Mr. Musk, on Twitter, said he was experiencing cold-like symptoms and, when taking four of the same tests administered on the same machine, had two results come back positive and two negative.
“Something…
This post first appeared on wsj.com
