A second resident of IRT Tarrawanna has died after testing positive for COVID-19, with 26 cases now linked to the aged care cluster.
The man, aged in his 90s, died in Wollongong Hospital after being admitted for treatment, IRT confirmed.
"Our thoughts are with his wife, family and friends as they mourn the loss of their loved one," CEO Patrick Reid said.
His death follows that of another male IRT resident in his 90s at the weekend.
As of Tuesday, 17 residents with COVID-19 were being cared for at the Tarrawanna aged care centre and five at Wollongong Hospital.
Four staff members continue to recover at home.
Mr Reid said some were experiencing a range of symptoms including a fever and cough, while others were still "relatively symptom-free".
"With support from the Virtual Community Care team, we are monitoring all of the residents in the care centre closely, including those who have tested negative to COVID-19," he said.
"We understand this is a challenging situation for residents, their families and our staff and we continue to do all we can to support and protect them during this difficult time.
"We are very grateful for everyone who is working with us in doing all we can to keep each other safe."
Results received so far from testing on Monday recorded no new positive cases at the age care facility.
Meantime, all residents and staff of IRT Links Seaside Aged Care Centre who underwent tests on Tuesday returned negative results.
The round of testing was triggered when a fully vaccinated staff member tested positive.