Facebook was planning to host its Global Marketing Summit in San Francisco from March 9 to 12, but recently canceled the event because of the coronavirus.
"Out of an abundance of caution, we canceled our Global Marketing Summit due to evolving public health risks related to coronavirus," Facebook spokesman Anthony Harrison said.
Verizon, AT&T, and IBM pulled out of the RSA Conference, one of the biggest cybersecurity conference events in the world. The companies are among 14 event sponsors to leave the event because of the coronavirus.
Another conference, the Game Developers Conference, also lost attendees over concerns about the virus. Facebook, Facebook's Oculus, and Sony won't be attending the event, which is scheduled to be held in San Francisco from March 16 to 20 at the same venue that Facebook's cancelled conference would have been held.
GDC said that the conference will include measures to prevent the spread of the virus on-site.
The economic impact of the cancellations are likely to be big. The Facebook event typically brings in about 5,000 guests, and San Francisco estimates that visitors to the city for conferences spend around $567 per day.