CDC December 20, 2021 5:19 pm Omicron Accounted for 73% of US COVID-19 Cases Last Week Omicron accounted for 73% of new COVID-19 infections last week in the United States, according to federal health officials. Local 1:57 Man charged after woman randomly attacked while walking dog in suburban park: Police 2:08 Monday evening forecast: Severe weather threat looms 3:25 Dolton mayor's former assistant addresses alleged Vegas sexual assault 0:45 Lockdown at Archer Heights charter school lifted after teen shot at nearby restaurant 2:10 Millions of birds cross through Illinois during peak migration season