Startups, governments and nonprofits are racing to create so-called “vaccine passports,” or digital health passes aimed at helping people travel and safely move around in public. WSJ explains what it would take to get a global digital health pass system off the ground. Illustration: Zoë Soriano 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 #Vaccine #Travel