The city announced that large gatherings are banned in Austin until May 1st, so Motogp is probably cancelled as well.
https://www.kxan.com/news/coronavir...tm_medium=social&utm_source=twitter_KXAN_News
Considering the land around and including COTA was annexed by the city of Austin several years ago, this restriction on public gatherings would seem to apply to the track. Thats is, unless the track qualifies for one of the exceptions mentioned in kelsodeez's link.