An epidemiologist believes the next Omicron wave may have begun, RNZ reports, with an upsurge in Covid-19 figures in the past few days. The Ministry of Health yesterday reported the seven-day rolling average of community cases sat at 6825, having risen by more than 2000 in a week. Hospitalisations have also climbed by 33% in seven days, with 423 people now in hospital with the virus. Waning immunity over the coming months may also lead to more spread of the virus.