While the decision to keep the whole of New Zealand in lockdown until Friday came as a disappointment to many, experts say a cautious approach is best, Stuff reports. Associate Professor Arindam Basu, from the University of Canterbury’s College of Education, Health and Human Development, said, “We are still in that period where someone who was infected last week could show up on test results this week.” Auckland University microbiologist Dr Siouxsie Wiles also said it was the safest choice for the South Island to remain at alert level 4, given that the virus is still within its incubation and that close contacts had travelled all around the country.