Thousands of aged care residents infected as COVID-19 hits a third of facilities across Australia.
Mr Sadler said 2,301 residents have died in 2022, including 114 in the past week.
He called for more support for a surge workforce, including ADF personnel, until at least September.
Over the longer term, Mr Sadler said, the federal government must plan to fix chronic workforce shortfalls, prepare for future outbreaks and implement reforms recommended by the recent royal commission into aged care.
“The coming weeks are critical for aged care. We must do all we can to put the protection of older people first and support our aged care workers,” he said.
Last week, the government outlined its response to how aged care facilities would manage the rise in cases during winter.
The government’s winter plan in aged care is based around an increase in vaccination, antiviral access, visitor and worker safety, infection control training and proactive engagement.