Two mystery cases of coronavirus have put several busy Queensland venues on high alert just days before the state is set to host the NRL Grand Final.
A Brisbane guest house has now been sealed off amid reports of a second case to rock the city.
The Adalong guest house on Stephens Road has been cordoned off and is under police guard with more than a dozen residents put into isolation and being tested.
An infected man, in his 30s, has not been overseas and has had no known contact with a Covid case, but does work in the aviation industry.
A childcare centre, a McDonalds and two busy shops have been added to a late night list of close contact sites in the Sunshine State after his surprise diagnosis.
Parents of children who attend the Mother Duck Childcare and Kindergarten were sent a letter advising them a Covid-infected person had visited the centre.
A mystery case of coronavirus has put Queensland on high alert just days before the state is set to host the NRL Grand Final (pictured, health care workers in Brisbane)
The Mother Duck Childcare and Kindergarten (pictured) in northeast Brisbane was attended by a positive Covid-19 case last week
Graham Nielsen, a physician from the Metro North Public Health Unit told parents a Covid-positive aviation worker had come into contact with the centre on September 23.
The worker is believed to have visited the site unknowingly infected with Covid-19.
Anyone who attended the childcare centre, 10km northeast of Brisbane's CBD, from 7:25am to 8:00am last Thursday is considered a casual contact of the virus.
Those who attended the centre at the listed
