COVID-19 vaccine distribution’s ‘last mile’ poses huge challenges

A race to develop a COVID-19 vaccine began almost the minute the coronavirus’s genetic makeup was revealed in January. Already, two companies have announced that their vaccines appear safe and about 95 percent effective (SN: 11/18/20, SN: 11/16/20). Government regulators in the United Kingdom granted permission December 2 for emergency use of a vaccine made […]