A Covid-19 modeller believes cases will rise again when Auckland's border reopens. 

And he's recommending unvaccinated people get tested after they travel, as well as before as the law requires.

Daily Covid-19 case numbers have dropped below 100 a handful of times in recent days, down from more than 200 a fortnight ago.

98 were announced yesterday across Auckland, Waikato, Bay of Plenty, Taranaki, and Nelson.

Modeller and principal investigator for Te Punaha Matatini, professor Michael Plank told Māni Dunlop that the case numbers had dropped more sharply than predicted.