Covid 19 coronavirus Australia: Young mum dies with virus in Sydney

Ianeta Isaako, pictured with her husband Sako. Photo / Facebook

A 30-year-old mother of three has died at home in Sydney's west after being diagnosed with Covid-19.

Ianeta Isaako on Monday became the youngest woman in NSW to die with the virus.

Friends and family have written on social media with tributes to Isaako and well wishes to her husband Sako, who is also fighting Covid-19.

"I know there is nothing in this world matters anymore, when death takes the most beautiful part of your heart. I want you to think of what she would've wanted you to do," one person wrote.

"My heart is broken," said another.

Ianeta Isaako, pictured with her husband Sako. Photo / Facebook

Health officials confirmed Isaako's death on Tuesday afternoon, the 75th since NSW's latest outbreak began on June 16.

"NSW Health extends its deepest sympathies to her loved ones," the department said.

"This tragic death is being investigated by the Western Sydney Local Health District."

Her death has been referred to the coroner.

Earlier, NSW chief health officer Kerry Chant said authorities were aware of the media reports but were unable to determine the cause of her death.

It is not yet known if the woman had any underlying health conditions or whether or not she was vaccinated against Covid-19.

NSW Premier Gladys Berejiklian praised Blacktown, the local government area the woman lived in, for dramatically ramping up its vaccine rollout.

"We've seen Blacktown go from one of the lowest rates of vaccination to the highest in the state. Thank you to the people from Blacktown for coming forward and getting the jab."

Six million people have now received their first vaccine dose in NSW, which recorded 753 new locally acquired cases of Covid-19 yesterday.