Prison advocate Debbie Kilroy and activist Boneta-Marie Mabo, Eddie Mabo's granddaughter, have both tested positive for COVID-19 after being on the same flight as Home Affairs Minister Peter Dutton several days ago.

Ms Kilroy posted on Twitter on Monday morning confirming their tests had come back positive, and both were in home quarantine – the first infected people not being admitted to hospital, she said.

Prisoner advocate Debbie Kilroy (left) and activist Boneta-Marie Mabo both test positive for COVID-19.

"We are not being hospitalised as there’s limited beds," she tweeted.

"Yes it’s frightening but I’m healthy and should be fine after 14 days. Take care of yourselves plz."