It wasn't until Day 7 of her team's coronavirus investigation when it dawned on Linda Vail, the health officer for Michigan's Ingham County, that this was going to be a big one. It had started with just two infections at the college bar on June 18, not long after the state began reopening. But the numbers quickly jumped to 12, then 18, then 34.

European carmakers from PSA Group to Volkswagen are shutting down production across the region as health concerns over the coronavirus pandemic and border restrictions snarling trade hurt their ability to run plants and get supplies.