More than a month into a resurgence of the novel coronavirus that has besieged Sun Belt states, flooded hospitals and strained public-health infrastructure, the U.S. still lacks a complete picture of the reality on the ground. That’s because the U.S. doesn’t have ANY real-time system to track the virus’s spread. At times, even the federal government has had to rely on third-party databases. Emma Court reports on the danger of a Covid-19 data black hole.