Authorities on Thursday confirmed two deaths in Hunter New England health district, with 46 people in hospital and four requiring intensive care.

The infant's tragic death, first reported by the Newcastle Herald in January, was referred to the coroner.

NSW Health said the coroner found the child died due to COVID-19 and had no underlying health conditions.

"NSW Health offers its heartfelt condolences to the family and asks that their privacy be respected during this most difficult time," the service said in a statement.

"The infant was infected with the Omicron variant of COVID-19, as was a two-year-old child from Sydney whose death due to COVID-19 was reported on Monday this week."

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Seven adult deaths were included in Thursday's update: two people from northern Sydney, one from its inner west, two more from Shellharbour, one person from Midcoast Council area and the seventh from the Central Coast.

Authorities said six of the adults were over the age of 65, and three of those had received three doses of vaccine. The other three had received two doses.

The younger man, in his 40s, had received three doses "and had significant underlying health conditions".

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