The death rate from COVID-19 in the U.S. is rising steadily for the first time in months as the nation grapples with a renewed burst of cases in what's become "a pandemic of the unvaccinated," the head of the CDC said Friday. The seven-day average of new cases has increased by nearly 70% to almost 30,000 per day; hospitalizations are up 36%. And deaths from the virus have risen steadily in recent days, reversing a months-long downward trend that began in mid-January.