North Korea said it was achieving "good results" in its fight against its first confirmed COVID-19 outbreak, as the number of people with fever symptoms rose past 2 million

A wave of COVID infections, which North Korea first confirmed last week, has fanned worry about a lack of medical resources and vaccines in the isolated country heavily sanctioned for its nuclear weapons programme.

North Korea has not responded to offers from its old enemies, South Korea and the United States, to send help, a South Korean official said.

South Korea's new president, Yoon Suk-yeol, and U.S. President Joe Biden, due to arrive in South Korea on a visit later on Friday, are expected to discuss help.

North Korea reported 263,370 more people with fever symptoms, and two more deaths, taking its total fever caseload since late April to 2.24 million as of Thursday evening, including 65 deaths, according to its KCNA state news agency.

North Korea lacks COVID testing capacity and it has not specified how many of those people with fever have been confirmed to have contracted COVID.

Despite the caseload, the North has said farming continues and factories are working. It is also planning a state funeral for a retired general.

"Even under the maximum emergency epidemic prevention situation, normal production is kept at key industrial sectors and large-scale construction projects are propelled without let-up," KCNA reported.

"Good results are reported steadily in the ongoing anti-epidemic war," it said.