A 90-year-old woman died on Saturday and testing confirmed that she had COVID-19, NSW Health said in a statement on Sunday night.
She was a resident of the Dorothy Henderson Lodge aged care home, where two other residents have died after becoming infected with the virus.
A 77-year-old woman has also died from coronavirus, NSW Health said on Sunday.
The woman flew from Brisbane to Sydney on Friday, a Queensland Health spokesman told AAP.
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