"We will need to increase and improve our local surveillance efforts, including genomic surveillance of variants are circulating in the community."
Welch said New Zealand's genomic surveillance was struggling to cope under the high number of cases and as part of its ongoing response needed a gold-standard system to sequence most cases who were recent arrivals, most hospitalised cases, and a random sample of cases found in the community.
Covid-19 modeller professor Michael Plank agreed the Government needed a toolbox of sustainable measures to monitor the variants coming in.
While opening the borders was the right move and a huge milestone given New Zealand now had comparable levels of infection as other countries, it didn' t mean the pandemic was over, he said.
One of these tools was testing international arrivals to keep a close eye on what was happening at the border so they could detect and respond to a new variant as quickly as possible.
Prime Minister Jacinda Ardern announced the new dates today, saying the country was ready to welcome tourists back in.
Ardern said New Zealand was a safe place to visit, adding trans-Tasman travellers were crucial to the domestic tourism sector.
Australians would be able to arrive in time for the school holidays and boost the ski season, but visitor numbers would be lower than in 2019.
Travellers would be given negative rapid antigen test results as part of a welcome pack on their arrival into the country and should be prepared to isolate in one place if they fell ill.
Ardern said the system was likely to evolve in time, for example to consider how unvaccinated people overseas could visit New Zealand.
