Prime Minister Scott Morrison has urged Australians in China to get on the last commercial Qantas flights out of the country and warned the government may not be able to rescue them if they become stranded during a growing coronavirus lockdown.

Two evacuation flights out of Wuhan, the epicentre of the epidemic in Hubei province, have now left the country, but Qantas is still running commercial flights out of Shanghai and Beijing until Sunday. Shanghai is more than 800 kilometres east of Wuhan, where the disease began in December; Beijing is 1500 kilometres north of Wuhan.

Prime Minister Scott Morrison, Minister for Defence Linda Reynolds, Minister for Veterans and Defence Personnel Darren Chester, second left, and Liberal MP Phil Thompson, right, at a press conference on Wednesday. Credit:Alex Ellinghausen

"Australians who are in mainland China should not assume that Australia will be in a position to put flights as we have into Wuhan," Mr Morrison said in Canberra on Wednesday.

"I would simply say that Qantas are running flights until 9 February and they should avail themselves of those opportunities."