New Zealand's managed isolation facilities now house both the highly-transmissible UK variant of Covid-19 and a new strain associated with South Africa.
Almost a quarter of the country's live cases are now the U.K. variant with that amount expected to increase. Australia is tightening its MIQ rules after the U.K strain was found in its community.
And One Covid-19 data modeller here says should either variant get past New Zealand's border, he would expect an immediate alert level 4 lockdown.
RNZ's Matthew Theunissen reports.