Picton, population 4790, effectively doubled in size on Wednesday as cruise ship Ovation of the Seas docked in the Marlborough Sounds town carrying 4500 crew and passengers, including 129 passengers and two crew members who have Covid-19.
Covid-19 Modelling Aotearoa co-lead Dr Emily Harvey has run the numbers on just how likely cruise ships are to have passengers with COVID-19 - and the impacts on towns they visit.
She spoke to Māni Dunlop.
