Arielle Mitropoulos, ABC News

Sixth child dies in connection to mysterious hepatitis cases with unknown cause

Kevin C. Cox/Getty Images(NEW YORK) -- Another child in the U.S. has died in connection with the...

CDC urges second booster for older, high-risk Americans amid nation’s latest COVID-19 surge

Morsa Images/Getty Images(NEW YORK) -- Following the nation's latest COVID-19 resurgence, the Centers for Disease Control...

World ‘woefully’ unprepared for COVID-19 and remains ill-equipped for next pandemic, report finds

Joe Raedle/Getty Images(NEW YORK) -- The world was "woefully" unprepared for the COVID-19 pandemic, and remains...

Investigation into mysterious pediatric hepatitis cases in the US expands

Westend61/Getty Images(ATLANTA) -- The Centers for Disease Control and Prevention (CDC) is now investigating at least...

Nearly every state expected to see increase in COVID-19 hospitalizations, forecast shows

Scott Olson/Getty Images, FILE(NEW YORK) -- As the nation's COVID-19 resurgence reaches its highest point since...

300,000 US COVID deaths could have been averted through vaccination, analysis finds

Morsa Images/Getty Images(NEW YORK) -- COVID-19 vaccines could have prevented at least 318,000 virus-related deaths...

Massachusetts reaches $56 million settlement in deadly Holyoke Soldiers’ Home COVID-19 outbreak

Matthew Cavanaugh/Getty Images)(HOLYOKE, Mass.) -- Massachusetts has reached a $56 million settlement with the families of the...

‘Unthinkable tragedy’: US COVID-19 death toll surpasses one million

Jackyenjoyphotography/Getty Images(NEW YORK) -- What was once unthinkable -- is now a reality. One million Americans have...

Breakthrough deaths comprise increasing proportion of those who died from COVID-19

Massimiliano Finzi/Getty Images(NEW YORK) -- A growing proportion of COVID-19 deaths are occurring among the vaccinated,...

Hospital admission totals tick up after weeks of rising COVID-19 cases

FS Productions/Getty Images(NEW YORK) -- Following weeks of increasing infection rates, a growing number of Americans...