Here are the latest updates and maps of where the virus has spread.

Some recent developments:

Test results could be released today for some of those aboard a cruise ship that has been held off San Francisco, after two former passengers were found to be infected.

Hubei, the Chinese province at the center of the outbreak, reported today that it had no new infections outside its capital, Wuhan. The news is a milestone in the Chinese government’s campaign to combat the epidemic.

The number of confirmed cases in New York has doubled to 22, and more than 2,700 people are isolated at home.

Some health care workers in California and Washington State say they lack the protective gear and protocols to keep themselves and their patients safe.

In Japan, public anger is mounting over Prime Minister Shinzo Abe’s clumsy response to the outbreak.

A mathematician who studies the spread of disease explained some coronavirus figures.

Related: “Don’t touch your face” has become a common piece of advice, but it’s not an easy habit to break. Keeping tissues handy and keeping your hands busy are among the tricks to help you stop.

Read more about symptoms and the prospects for vaccines and treatments. For an informed guide to the outbreak, sign up for our coronavirus newsletter.

The economic toll of the coronavirus

“Just as the disease poses a particular threat to older patients, it could be especially dangerous for more mature economies,” writes Austan Goolsbee, an economics professor and a former adviser to President Barack Obama.

That’s because economies like the U.S. are dominated by face-to-face service industries, which are damaged when people stay home.