About 187,800 people are being treated in isolation after a fever of unidentified origin has "explosively spread nationwide" since late April, the official KCNA news agency reported.
Roughly 350,000 people have shown signs of that fever, including 18,000 who newly reported such symptoms on Thursday, KCNA said. About 162,200 have been treated, but it did not specify how many had tested positive for COVID-19.
At least six people who showed fever symptoms died, with one of those case confirmed to have contracted the Omicron variant of the virus, KCNA said.
More about: North-Korea coronavirus