COVID-19 vaccine shipments begin in historic US effort

Boxes containing the Pfizer-BioNTech COVID-19 vaccine are prepared to be shipped Sunday at the Pfizer Global Supply Kalamazoo manufacturing plant in Portage, Mich. (AP Photo/Morry Gash, Pool)

PORTAGE, Michigan — The first of many freezer-packed COVID-19 vaccine vials made their way to distribution sites across the United States on Sunday, as the nation’s pandemic deaths approached the horrifying new milestone of 300,000.