Good morning.

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When I called David Levine, a professor at the University of California, Berkeley’s Haas School of Business, he was working on figuring out how to use Zoom, a video conferencing application, to teach.

“I’ve been preparing for this, but it turns out I have more to do,” he told me.

U.C. Berkeley is one of a rising number of universities that have canceled in-person classes in an effort to slow what experts describe as the largely inevitable spread of the coronavirus.

Large employers across California have taken similar steps, ordering employees to work from home or postpone all but the most vital travel.

[Read more about working from home in the age of the coronavirus.]

As The San Francisco Chronicle noted, there’s no clear endpoint for many of the measures. The situation, as we’ve reported, is changing at an almost overwhelming pace.