The continuing research, co-led by the Kirby Institute and Nationwide Centre for Immunisation Analysis and Surveillance in collaboration with Lifeblood, surveys blood samples to detect antibodies to the virus.
The authors have defined antibodies are most probably to be discovered if the particular person's an infection was previously three to 6 months.
The most recent outcomes have instructed at the least 46 per cent of adults had been contaminated with COVID-19 in 2022.
The information signifies virtually triple the variety of Australians who had COVID-19 by late February had skilled it by early June.
The earlier outcomes from the research, which measured blood samples up till late February, estimated that solely round 17 per cent of the Australian inhabitants had been lately contaminated.
Examine creator Dr Dorothy Machalek mentioned the research was more likely to be extra indicative of the particular charge of COVID-19 infections in comparison with COVID-19 testing information.
"Whereas we all know there may be quite a lot of virus circulating locally, we won't depend on testing information alone to grasp how many individuals have been contaminated, as some could expertise solely delicate signs, or none in any respect, and so they could not all the time have a check to detect the virus," she mentioned.
The subvariants and mutations of COVID-19
"There may be additionally excessive use of fast antigen exams, which do not all the time get reported.
"These serosurveys present a extra full image of how a lot COVID-19 is on the market as a result of they measure antibodies to the virus, created when the physique's immune system responds to an infection, that stay current for a lot of months afterwards."
The most recent outcomes got here from 5139 de-identified samples from Australian blood donors aged 18 to 89 years.
Among the many samples, proof of latest COVID-19 an infection was highest amongst donors within the 18-29 12 months age group, with 61.7 per cent having antibodies.