вот более новое
https://news.iu.edu/stories/2020/05/iupui/releases/13-preliminary-findings-impact-covid-19-indiana-coronavirus.html

After analyzing these test results, IUPUI public health
researchers determined that during the last week of April,
1.7 percent of participants tested positive for the novel
coronavirus and an additional 1.1 percent tested positive
for antibodies -- bringing the estimated population
prevalence of the virus in the state to 2.8 percent, or
approximately 186,000 Hoosiers who were actively or
previously infected as of May 1, Menachemi said.

As of the same date, the state's testing showed about
17,000 cumulative cases -- not including deaths --
suggesting that only about one out of every 11 true
infections were identified by tests focused on symptomatic
or high-risk people.