https://wccftech.com/kojima-productions-cancels-its-gdc-2020-attendance-due-to-coronavirus-concerns/

Kojima Productions, the Japanese studio created by renowned game designer Hideo Kojima after his departure from Konami, announced today its decision to cancel the planned attendance at the yearly Game Developers Conference (GDC) in San Francisco, California.

Here's the official brief shared on the studio's website.