Go deeper: The virtual shutdown of much of China’s economy is hurting business around the world, including multinational firms, truck drivers and tour guides. “All our planning has been turned upside down,” said Michael Smerling, the owner of a company in the U.S. whose Chinese suppliers have been shut down.

Related: Washington’s partisan divide makes a fiscal stimulus package seem like a long shot, but a deteriorating economy could be a great motivator, our senior economics correspondent writes.

Another angle: A growing number of American workers could be asked to alter their routines because of the outbreak, or to stay home. Here’s what could happen — and what rights employees have.

A big day for Democrats

Millions of voters are expected to go to the polls today, when about a third of the delegates in the Democratic presidential race will be allocated. Here are the latest updates.

Fourteen states (as well as American Samoa and Democrats Abroad) are voting today. Polls begin closing at 7 p.m. Eastern, and the first call of the night will probably be Vermont, for its home-state candidate, Senator Bernie Sanders.