Hopes health officials will finally get to the bottom of what's going on at the Pullman Hotel isolation facility

The Ministry of Health said they were "scratching their heads a little" yesterday -- following another person testing positive with Covid-19, after leaving the Auckland MIQ.

It's now the fifth community case connected to the Pullman in the past two weeks.

Investigations are continuing into the hotel, with the last group of guests due to leave today.

University of Auckland professor of medicine Des Gorman says they need to provide an explanation of how this many people were infected.

He says he questions why this hasn't already been done -- and it seems to be shutting the door after the horse has bolted.