The case is the third in the country, following confirmation of two cases from Lae, Morobe Province in June and July 2018.
The confirmation was made on Friday 3 August by the Victorian Infectious Disease Reference Laboratory – a WHO Collaborating Centre in Australia.
The boy had an onset of symptoms on 30 June and onset of paralysis on 2 July. His vaccination history is unknown due to unavailability of the baby clinic book, and his travel history is being established.