As the coronavirus continues to spread around the globe, companies and academic labs are racing to develop a vaccine that would help society get back to normal. But there could also be costs to moving too quickly. WSJ’s Daniela Hernandez explains. Photo illustration: Laura Kammermann 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 #WSJ #Coronavirus #Vaccine