A hunt is underway for the missing link that passed COVID-19 from a Brisbane doctor to the city's newest case.
Genomic testing on Friday night confirmed the 26-year-old man's coronavirus infection is linked to a Princess Alexandra Hospital doctor who was diagnosed on March 12.
It was also confirmed the man, a landscaper, had the coronavirus variant first reported in the UK, which is more contagious.
The doctor visited four venues in the city's south while she was infectious, but Queensland Chief Health Officer Jeannette Young said it was likely the new case had caught the virus from an intermediary yet to be identified.
Authorities have listed 11 exposure sites visited by the landscaper including the shopping centre in Carindale and Bunnings, Aldi and Guzman y Gomez outlets in Stafford.
Anyone who visited those sites must immediately get tested regardless of whether they have symptoms, and isolate until results are received.
Those who were at Mamma's Italian Restaurant at Redcliffe on March 21 between 12.40pm to 3.10pm are close contacts and will now be required to isolate for 14 days.
The man's infection sparked another lockdown of the city's hospitals and aged care homes, after he spent a week in the community while infectious.
The partial lockdown, which kicked in at noon on Friday, won't end for a week and affects hospitals, aged care facilities, prisons and disability services providers in the Brisbane City and Moreton Bay council areas.
Dr Young on Friday said the next 24 to 48 hours will determine if a wider lockdown is needed. Six other coronavirus cases were recorded in Queensland on Friday, all detected in hotel quarantine.
Health authorities in NSW, Victoria, Western Australia and Tasmania have advised anyone who visited the Queensland exposure sites against entering the states.
If recent visitors to a high-risk site or area have already travelled interstate, they are advised to self-isolate and contact public health authorities.
People in Australia must stay at least 1.5 metres away from others. Check your jurisdiction's restrictions on gathering limits. If you are experiencing cold or flu symptoms, stay home and arrange a test by calling your doctor or contact the Coronavirus Health Information Hotline on 1800 020 080. News and information is available in 63 languages at .
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