MLB has determined that, as of 4:00 EST today, Spring Training games will cease and the season postponed at least two weeks.
This ruling follows in the footsteps of the NBA, which has suspended the regular season due to a player contracting the novel coronavirus, with MLS and the NHL following suit. Meanwhile, the NCAA has declared March Madness will be played without crowds... for now, anyway.
The two week delay would have baseball return in mid-April, but it should be noted that
A delay is one thing, but a shortened or cancelled regular season may mean something else entirely.