Positive results in COVID-19 vaccine trial of 5-to-11-year-olds tempered as U.S. daily death rate tops 2,000 for first time since March 1

Positive results from a trial of the COVID-19 vaccine developed by Pfizer and German partner BioNTech in children aged 5 to 11 was tempered Monday by a rising average death rate, with the U.S. now seeing more than 2,000 fatalities a day for the first time since March 1.