New Zealand has had 78 more confirmed or probable cases of Covid-19 today, taking the total in New Zealand to 283.

Health authorities are now investigating several possible clusters of the virus around the country, including a Wellington wedding, Marist College, and people associated with the Ruby Princess cruise ship.

Infectious diseases expert David Hayman from Massey University told Heather du Plessis-Allan that things are likely to get worse.

However, New Zealand is now in a good position to slowly stop the spread of coronavirus.

"The more transmission there is, the harder it is for public health officials to chase them, and the longer we are at this high alert level and we're shut down."

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