Indiana is doing antibody sampling, similar to what New York and some other areas have done.
Preliminary results: 2.8% of the state's population, or 186,000 people, have or had the virus as of May 1. The confirmed number of cases as of May 1 suggests that only about 1 in 11 infections were being identified.
The state's fatality rate comes out to 0.58%, which is in the general ballpark of what other similar antibody testing has suggested elsewhere. About 45% of infected individuals never had symptoms.
The good news in all of this is that the spread was slowed dramatically by the measures that were taken, as our antibody results are well below what was observed in New York. The bad news is that we have a long way to go, assuming it is true that about 97% of the state's population has not been exposed. And I suspect the truly rural states (Indiana is not Wyoming) have had even less exposure.
https://www.wishtv.com/news/medical/study-estimates-186000-hoosiers-had-covid-19-or-antibodies-by-may/