Early results from a representative household-based survey in Indiana. 4600 participants. 1.7% PCR positive + 1.1% seropositive = 2.8% with active/prior infection. Estimated 11x infections as reported. IFR = 0.6%. Disproportionately affecting minorities. https://www.nytimes.com/2020/05/13/opinion/indiana-reopening-coronavirus-testing.html

Their random testing program is described here, and will be repeated over time. https://twitter.com/nataliexdean/status/1253455651734466561?s=20

A few more details. Seems to just be results by press briefing so far.

The study found the prevalence among the state's White population at 2.5 percent and 4.8 percent for non-white. ... 44.8 percent of Hoosiers infected with COVID-19 showed no symptoms. https://www.14news.com/2020/05/13/dubois-co-officials-report-new-covid-cases/