Ardern and Governor-General Dame Cindy Kiro were forced to isolate on Saturday after an attendant on their flight from Kerikeri to Auckland tested positive for Omicron.
Ardern and Kiro were returning from the Bay of Islands after filming pre-recorded speeches for Waitangi Day. There will be no traditional public event due to Covid-19 restrictions.
"The Prime Minister has returned a negative Covid-19 test. In line with Ministry of Health guidance she is required to continue isolating until the end of Tuesday, February 1, or as otherwise advised by Public Health," a spokesperson said today.
"She will Chair tomorrow's Cabinet meeting remotely."
As she is not be able to be in the Beehive in person tomorrow, Deputy Prime Minister Grant Robertson will attend the post-Cabinet media briefing on her behalf, the spokesperson said.
RNZ reported this afternoon that Dame Cindy has also returned a negative test.
All those on the flight are considered close contacts.
One of them, Ardern's chief press secretary Andrew Campbell, confirmed to The New Zealand Herald this morning that he had tested negative.
Ardern took a PCR test Sunday morning, as per Ministry of Health requirements.
"She remains asymptomatic and continues to feel well," the spokesperson said yesterday.
That flight has been deemed as "high risk" on the Ministry's updated locations of interest list.
A statement released by the Prime Minister's office shortly after 10pm on Saturday said: "Whole genome sequencing for the case has been requested with an expected result on Sunday.
"The result is expected to indicate that the case has been infected with the Omicron variant and the public health response reflects this.
"All other passengers on board NZ8273 are also deemed close contacts and are required to self-isolate, get tested immediately and remain in isolation for 10 days following their exposure."
They will also need to follow further isolation and testing requirements provided by public health officials.
