Some of the regions most affected by the virus, including Italy and China, are not major markets for Uber. But the company has seen a decrease in rides to and from airports, Mr. Chai said. The company is also expecting to lose commuter rides as more people work from home.

An Uber spokesman declined to comment on the remarks.

Mr. Chai’s message differed from that of Lyft’s chief financial officer, Brian Roberts, who said last week at a financial conference that the company was experiencing its strongest week to date.

“We believe people would be more likely to use ride share than a crowded bus or subway. On the negative side, less travel could lead to fewer high-value airport rides and there could just be less business activity overall,” JP Morgan analyst Doug Anmuth wrote in an investor note last week after Mr. Roberts’s comments.

A Lyft spokesman did not immediately respond to a request for comment.

New York auto show is moved to August.

The annual New York International Auto Show, scheduled to open in early April at the Jacob K. Javits Convention Center, has been rescheduled for August out of concerns about the coronavirus, its organizers said on Tuesday.

The show, which draws hundreds of thousands of people each year, is owned and operated by the Greater New York Automobile Dealers Association, led by Mark Schienberg. It was set to open for media days on April 8 and run through April 19. The new dates are to be Aug. 26 to Sept. 6.

“For 120 years, ‘the show must go on’ has been heavily embedded in our DNA,” Mr. Schienberg, the association president, said in a statement announcing the move. He added, “While the decision to move the show dates didn’t come easy, our top priority remains with the health and well-being” of those involved.

The decision was made after Gov. Andrew M. Cuomo over the weekend declared a state of emergency in New York.