The United States reported record-high cases and hospitalizations yesterday, with no end in sight and amid warning that the virus could gain even more of a foothold during upcoming holiday gatherings.Chicago's mayor today announced a new stay-at-home advisory, and New York city is on the brink of retuning to all-remote instruction.US markers rise sharplyThe nation reported another single-day high yesterday, piling up 144,133 new cases, along with 1,893 new deaths, according to the Johns Hopkins online dashboard.In its weekly analysis of US COVID-19 trends, the COVID Tracking Project said today cases rose sharply last week, up 40%, with testing rising by 13%.