covid19-projections.com (which has generally been quite good) estimates that ~a third of the US population has been infected with COVID. In South Dakota, which

covid19-projections.com (which has generally been quite good) estimates that ~a third of the US population has been infected with COVID. In South Dakota, which didn't institute any real restrictions, they estimate the number is close to ~50% [1]. Back in October - i.e. before the massive second wave most of the world saw over the winter - the WHO estimated that around 10% of the world's population had been infected with COVID [2]. It wouldn't be surprising at all if the number were substantially higher now. The idea that case numbers are underreported by only 80% worldwide is extremely generous. That's pretty close to the CDC's estimate for the US (1 in 4.6) [3], and the US has per capita one of the most aggressive testing regimens in the world [4]. [1] https://covid19-projections.com/infections/us-sd https://covid19-projections.com/infections/us-sd [2] https://www.usnews.com/news/health-news/articles/2020-10-05/who-estimates-coronavirus-has-infected-10-of-global-population https://www.usnews.com/news/health-news/articles/2020-10-05/... [3] https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/burden.html https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/burd... [4] https://www.statista.com/statistics/1104645/covid19-testing-rate-select-countries-worldwide/ https://www.statista.com/statistics/1104645/covid19-testing-...