Home Markets U.S. FDA commissioner Robert Califf tests positive for COVID U.S. FDA commissioner Robert Califf tests positive for COVID Andrew M Nov 08, 2022 comments off Tweet on Twitter Share on Facebook Google+ Pinterest Original source: https://www.investing.com/news/stock-market-news/us-fda-commissioner-robert-califf-tests-positive-for-covid-2935319 commissioner FDA Market Updates U.S. FDA