No cases? No chance. The truth about North Korea and Covid
North Korea declares 'zero cases' of coronavirus in new report to WHO
North Korea reaffirms no new coronavirus infection
North Korea continues to claim zero covid 19 cases, experts express skepticism
North Korea declares emergency as first COVID
Fact or Fiction: North Korea claiming no COVID
The WHO has suggested a positive rate lower than 10% — but better is lower than 3% — as a general benchmark of adequate testing.
Retrieved October 31, 2021.
The New York Times.