NBC News reports that she went to the Asaro Health Centre, about 35 minutes by road, outside the provincial capital Goroka, and was admitted.
Manning says the woman was managed for one week and her condition improved. On April 17 her test samples were collected and sent to PNG Institute of Medical Research in Goroka and the results came back positive four days later.
Manning says a second test is being done for quality assurance and best practice.
He says the health centre is locked down for disinfection and the staff have been asked to stay at home and are being kept under surveillance. Contact tracing activities began immediately.