New Zealand Prime Minister Jacinda Ardern, who has overseen her country’s world-leading response to the coronavirus pandemic, has tested positive for Covid-19, her office announced Saturday.

Ardern’s symptoms are moderate and she will isolate at home for seven days, the government said in a statement.

She has already been in isolation since last Sunday, when her partner Clarke Gayford tested positive, and was due to resume her parliamentary duties on Monday.

New Zealand enforced one of the world’s most restrictive approaches to managing the initial Covid-19 outbreak in 2020, and its death toll of 892 remains among the lowest of developed nations.