The Air New Zealand crew member who tested positive was "incredibly diligent" in taking precautions during a layover, the airline's chief medical officer says. The government has revealed it is getting another 8.5 million doses of the Pfizer Covid-19 vaccine. Combined with what it already has, it is sufficient for five million people to the two jabs needed. Jacinda Ardern says the decision to make Pfizer Aotearoa's primary vaccine provider is based on the fact the vaccine is around 95 percent effective. Meanwhile, 14 Air New Zealand crew are being tested and made to isolate after a flight attendant was found to have Covid-19 after arriving home from Japan. That crew member is in the Jet Park quarantine facility, and her family members have all tested negative and are isolating at home. Air New Zealand chief medical officer Dr Ben Johnston joins Lisa Owen to discuss.