From Schema.org:
The COVID-19 pandemic is causing a large number of “Special Announcements” pertaining to changes in schedules and other aspects of everyday life. This includes not just closure of facilities and rescheduling of events but also new availability of medical facilities such as testing centers.
We have today published Schema.org 7.0, which includes fast-tracked new vocabulary to assist the global response to the Coronavirus outbreak.
It includes a “SpecialAnnouncement” type that provides for simple date-stamped textual updates, as well as markup to associate the announcement with a situation (such as the Coronavirus pandemic), and to indicate URLs for various kinds of update such a school closures, public transport closures, quarantine guidelines, travel bans, and information about getting tested.