Two people undergoing Hotel Quarantine in the ACT have returned weak positive results for COVID-19.
One is a man aged in his 40s, the other a teenager.
ACT Health says these individuals are not known to have previously had COVID-19 overseas.
However, the weak positive results suggest these infections could be historical overseas acquired infections.
Prolonged shedding of virus fragments, is known to happen intermittently for up to several months after a person is no longer infectious.
Further testing is being conducted today to investigate whether these cases are historical.