As the U.S. and other countries fight Omicron, scientists in South Africa are starting to get a clearer picture. WSJ visited a leading lab studying the coronavirus strain, which appears to partially evade vaccines, is more infectious, and might cause milder symptoms. Photo: Waldo Swiegers/Bloomberg More from the Wall Street Journal: Visit WSJ.com: http://www.wsj.com/ Visit the WSJ Video Center: https://wsj.com/video On Facebook: https://www.facebook.com/pg/wsj/videos/ On Twitter: https://twitter.com/WSJ On Snapchat: https://on.wsj.com/2ratjSM #Omicron #SouthAfrica #WSJ