Nation One third of US counties set case records; Chicago schools closed again amid fight over safety measures: Updates January 10, 2022N'dea Yancey-Bragg and Mike Stucka, USA TODAYComments Off on One third of US counties set case records; Chicago schools closed again amid fight over safety measures: Updates One third of US counties have set case records. U.S. Rep. Alexandria Ocasio-Cortez tested positive. Latest COVID-19 updates.