Study on samples from US Haredi Jews casts new light on first days of COVID-19

 https://www.timesofisrael.com/study-on-samples-from-us-haredi-jews-casts-new-light-on-first-days-of-covid-19/

A paper published Wednesday in the Journal of the American Medical Association Network Open, a peer-review journal that is open to the public, concludes that the coronavirus was spreading widely in Orthodox communities across the country last spring around that Jewish holiday — before public health warnings were given about the dangers of large assemblies.