March 31, 2020 at 3:18 Central
South Korea has 9,786 cases with 5,408 fully recovered and 162 deaths.
Math
162 / 9,786 = 0.00633558 or approximately six tenths of one percent. Granted we don't know how the other 4,378 people will fare but based on the Diamond Princess, a semi-closed environment, the 0.6% death rate seems plausible.