But the responsibility for containing the spread of sickness has been placed squarely in attendees hands.
"If you have a temperature or cough or cold then stay at home and don't attend," the Ministry of Health said.
If someone is unwell and attends a large event anyway, they could put others at risk, he said.
"Those attending should follow the advice around regular handwashing and appropriate cough and sneeze etiquette."
It's also up to event organised to ensure people can practice good hygiene at the events, he said.
The Ministry of Health is also working to ensure there is information about Covid-19 at Pasifika.
This advice is constantly being reviewed.
Ardern is set to open the Pasifika Festival in Auckland on Saturday and speak at the memorial service in Hagley Park on Sunday to commemorate the first anniversary of the terror attacks on the Al Noor and Linwood mosques.
Opposition leader Simon Bridges is also set to go to both events.
Ardern said earlier today that she asked for the advice about the two large events to "reassure" herself.