Shannon Bond

Updated at 7:05 p.m. ET

Facebook said on Tuesday it will ban anti-vaccination ads, following widespread pressure on the social network to curb harmful content.

Under the new global policy, the company will no longer accept ads discouraging people from getting vaccines; ads that portray vaccines as unsafe or ineffective; or ads claiming the diseases vaccines prevent are harmless.

When Vern Dosch heard that Apple and Google had teamed up to develop smartphone technology to help curb the spread of the coronavirus, he was excited.

The last time you were in your office, who did you walk past in the lobby? Stand next to in the elevator? Chat with in the kitchen?

You're not alone if you can't remember each of those encounters. But that is exactly the sort of information employers want to have on hand, in case an employee catches the coronavirus.

Jerome Gage is one of those rare Lyft drivers still on the road these days, mask securely in place. He says that surprises some passengers.

"It's kind of like the cliché of a Christmas shopper going into Macy's at like 3 a.m. on Black Friday and saying, 'Wow, they have you working?' " he said. "Yeah, I'm working because people need us. They don't want to rely on public transportation.''

Many Lyft and Uber drivers have given up on driving, because they aren't making enough money to take the risk of potentially exposing themselves to the virus.

In a new move to stop the spread of dangerous and false information about the coronavirus, Facebook will start telling people when they've interacted with posts about bogus cures, hoaxes and other false claims.

For something like normal life to return after the worst of the coronavirus pandemic is over, it will be critical to identify — and isolate — people who have been exposed to the virus, whether or not they have symptoms.

Two Silicon Valley giants and some public health experts say our smartphones could help get us there.

April McGhee and her teenage daughter started feeling sick last month. They had coughs, sore throats and fevers. Her daughter's condition became so bad that they went to the emergency room.

"She had it worse than I did," McGhee said. "Her cough lasted longer. It was really a concern. ... It was like a dry, nonproductive, hacking cough."

McGhee, who lives in Sacramento, wanted both of them to get tested for the coronavirus. But the hospital told her they weren't sick enough to qualify for testing under California's rules. So, they went home and into isolation.

Uber is pausing its pool service, and Lyft is suspending its shared rides feature in the United States and Canada in an effort to slow the spread of the coronavirus.

Those services let passengers headed in the same direction carpool in exchange for cheaper fares.

But as cities tell people to avoid nonessential travel and stay at least 6 feet away from one another, Uber and Lyft say they are supporting public health guidance.

Amazon, Facebook, Google and Microsoft are telling employees in the Seattle area to work from home as the business world tries to reduce risks from the spreading coronavirus outbreak.

Facebook said a contractor in one of its Seattle offices had been diagnosed with the disease caused by the virus. The worker was last in the office on Feb. 21, and Facebook has closed the office until March 9. The company is encouraging all employees in Seattle to work from home through the end of the month.

Updated at 11:57 a.m. ET Wednesday

Google is the latest company to cancel a big event and curb employee travel as the global spread of the coronavirus outbreak has struck fear across the business world.

The tech company called off its flagship developers conference, called I/O, which was scheduled for May in Mountain View, Calif. Last year, the three-day event drew 7,000 attendees.

If you're having a hard time falling asleep, that sleep tracker on your wrist might be to blame.

And there's a name for this new kind of insomnia of the digital age: orthosomnia.

It's "when you just really become fixated on having this perfect sleep via tracker," said Seema Khosla, medical director at the North Dakota Center for Sleep. "And then you start worrying about it, and you wind up giving yourself insomnia."