Coronavirus is primarily a respiratory ailment primarily spread by exhaled droplets from coughs or simple breathing, which is why masks are so effective at preventing an infected individual from spreading it.
This obviously presents a few problems. Most people are completely asymptomatic for the first five days they harbor the virus. Any effort at an economic reopening must limit asymptomatic spreading, and the best way to do that is to maintain distance between individuals.
Which brings us to the graphic. It breaks down the American work force by distance. Any profession close to the top is one in which distancing at work is flat-out impossible. As one moves down the list, distancing becomes more and more built into the normal workflow.