The latest Covid-19 variant was detected last week in South Africa, and scientists say it's more transmissible and better able to evade current vaccines. President Joe Biden calls it "a cause for concern, not a cause for panic," but he rules out new "shutdowns or lockdowns." So what do people need to know about this new variant, and what is President Biden's plan to take it on? Learn more about your ad choices. Visit megaphone.fm/adchoices

WSJ Opinion: Potomac Watch

What Do We Know About the Omicron Variant?

From the award-winning opinion pages of The Wall Street Journal, Paul Gigot, Kim Strassel and Bill McGurn discuss the latest from Washington. Get critical perspective and the analysis you need on developments from the nation’s capital. Join them every Tuesday, Wednesday and Friday.