https://www.vice.com/en_us/article/884dn3/facebook-has-canceled-its-massive-developers-conference-because-of-coronavirus

Facebook announced Thursday that it will no longer hold F8, its annual developer conference because of the coronavirus outbreak.

"This was a tough call to make—F8 is an incredibly important event for Facebook and it’s one of our favorite ways to celebrate all of you from around the world—but we need to prioritize the health and safety of our developer partners, employees and everyone who helps put F8 on," Facebook wrote in a statement.