Children's Minister Tracey Martin is showing no symptoms of Covid-19.
The NZ First MP met with Australia's Minister for Home Affairs Peter Dutton during a Five-Eyes partners meeting in Washington DC.
Dutton had no symptoms of the coronavirus at the time but woke up with a temperature and sore throat yesterday.
Dutton has since revealed he has tested positive for coronavirus and is now in hospital.
A spokesperson for Martin said she had shown no symptoms, but was self-isolating as a precaution.
He said she also did not shake Dutton's hand when she was overseas.