Cite numbers please.
https://gisanddata.maps.arcgis.com/apps/opsdashboard/index.html#/bda7594740fd40299423467b48e9ecf6
See South Korea. Compare the numbers in a day or two, or a week, or back though all of times they’ve been posted about over the past month.
If there were a lot of unknown cases (multiples of known cases) in South Korea, the outbreak would be expanding sharply.