The Delta variant of the coronavirus that causes Covid-19 was transmitted between two groups of people at Auckland’s Jet Park Hotel when two hotel-room doors were open at the same time for just three to five seconds, Stuff reports. Covid-19 Response Minister Chris Hipkins says the transmission shows how quickly the virus has mutated. Meanwhile, “Immediate changes” have been made at Jet Park as a result, including to meal delivery and health check procedures, to prevent future episodes of doors opening at the same time.