46 per cent

Number of Australians who have had Covid-19 jumps in June survey

Researchers have conducted their second "serosurvey", testing blood donations for the presence of antibodies to SARS-CoV-2, to find the prevalence of infection had almost tripled since late February when it was estimated to be 17 per cent.

Kirby Institute senior research fellow Dr Dorothy Machalek said while the results revealed there was a "huge amount" of community transmission, it was not a surprise.