Labor leader Anthony Albanese has tested positive for COVID-19.

Mr Albanese announced the diagnosis tonight, which will likely throw his election campaign into turmoil.

He says he plans to continue campaigning whilst isolating at home.

"Following a routine PCR test this afternoon ahead of interstate travel to Western Australia, I have returned a positive result for COVID this evening," Mr Albanese said in a statement.

"I have been testing regularly as part of my election campaign duties.

"I will be isolating at home in Sydney for the next 7 days and will continue to follow health guidelines and advice.

"While at home I will continue my responsibilities as alternative Prime Minister and will be fighting for a better future for all Australians.

"I am grateful to know that I will have access to the world's best health care if I need it, because of Medicare.

"I am feeling fine so far — and thank everyone for their well wishes."

On top of Mr Albanese's isolation, further tormenting the Labor campaign will be figuring out how many senior members of the party, especially candidates, have been in close contact with the leader.

Mr Albanese spent Thursday afternoon in the seat of Bennelong, meeting locals there with candidate Jerome Laxale.

Mr Albanese wore a mask earlier on Thursday during a visit to the Symons House retirement village, in Nowra, NSW.

More to come.