AmazonFacebook Parent Meta, Twitter and Pinterest will not send teams to the Consumer Electronics Show (CES) in Las Vegas as concerns grow about Omicron, the firms said on Tuesday.

CES, which serves as an annual showcase of new trendsAnd gadgets in the technology industry has attracted more than 180,000 people from around the world to a sprawling array of casinos and convention spaces in the past.

Amazon and Ring, its smart-home division, said that they will not attend next month’s event because of the uncertainty and quick shifting situation surrounding the Omicron virus. A spokesperson for Amazon told Reuters via email.

Bloomberg News first reported that Amazon and Ring had decided against in-person presence at the show.

U.S. Wireless carrier and Conference Sponsor T-Mobile also said the vast majority of its contingent would no longer be going and its chief executive would not deliver a keynote speech.

T-Mobile explained that they were prioritizing safety for our attendees and team members with this decision, but expressed confidence in the fact that CES organizers took all precautions.

Other companies didn’t plan large gatherings in person.

The Consumer Technology Association (CES) announced Tuesday that the event would be held from January 5 through Jan 8. The association added that there would be health precautions such as masking, vaccine requirements and COVID-19 test availability.

Twitter planned to invite some of its employees to attend the event, so they could participate in panels. Twitter and Facebook however both confirmed that they were now looking into online opportunities.

Pinterest planned a more intimate meeting room for partner and sales teams before it was cancelled.

But many companies, such as Qualcomm, Sony Electronics and Alphabet’s GoogleAnd self-driving vehicle unit Waymo have said they are sticking with plans to attend and show off new hardware or host meetings.

Dienstag, General Motors said Chief Executive Mary Barra is still set to introduce the U.S. automaker’s electric Silverado pickup truck and discuss company strategy in person at the conference on Jan. 5.

Some companies have been planning for virtual presences since the beginning, such as chipmaker NvidiaTwo executives will deliver the keynote speech via video for.