U.S. COVID-19 cases rise amid vaccine milestone Seeking AlphaCovid News: Over 200 Million Americans Are Fully Vaccinated The New York TimesHalf of all Tennesseans fully vaccinated for COVID-19 WBIR Channel 10Delta drives surge in US cases before omicron gains foothold; 75% of US infections by new variant among vaccinated: Latest COVID-19 updates USA TODAYCOVID cases spike even as US hits 200M vaccine milestone Associated Press