Three new coronavirus cases have been confirmed in Victoria, taking state's total to 15.
Authorities confirmed on Monday two of the most recent cases are returned travellers from the United States and Iran.
The most serious case is a woman in her 50s who returned from Tehran via Kuala Lumpur on MH0149, arriving on March 6.
She is in hospital in isolation being treated for pneumonia and is in a stable condition after becoming unwell in Tehran on February 18 with a cough, fever and shortness of breath.
On arrival in Melbourne she was immediately driven to hospital by a relative.
A man and woman who travelled from the US are recovering in home isolation.
The man in his 50s was on flight UA60 on February 29 and has a very mild illness.
It is not clear if he contracted coronavirus from the flight or while overseas.
Before he was diagnosed he visited Wine by Sam in Seymour on March 3 for a winery tour and lunch, and attended Cinema Nova at Carlton from 7.30pm to 10.30pm for a private screening of The Amber Light.
The second traveller from America is a woman in her 20s who arrived from Colorado on QF94 from Los Angeles to Melbourne on March 6.
