Almost 50% of Australians had been infected with Covid as of mid-June, blood survey shows

Evidence of past infection was detected in 46% of samples, compared with 17% in February

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Almost half of all Australian adults had been infected with the Covid-19 virus between January and June this year, with many of those infected in the last three months, according to a national report.

The finding comes from a serosurvey of antibodies to the virus detected in blood donations, conducted at the Kirby Institute and the National Centre for Immunisation Research and Surveillance (NCIRS).

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