DIGITAL HEALTH: When Red Is Unlucky

摘要

China's color-coded apps for tracking the outbreak emerge as a model for other virus hotspots. IN JANUARY, when officials in Wuhan, China, declared a citywide quarantine to contain the coronavirus, they enforced the order with old-fashioned barricades. Walls of bright yellow and blue plastic sealed off streets, bisected neighborhoods, and isolated 11 million residents in their homes, initiating the largest lockdown in human history.