Most States Aren’t Ready to Distribute the Leading COVID-19 Vaccine

Most States Aren’t Ready to Distribute the Leading COVID-19 Vaccine: The Pfizer vaccine is unusually difficult to ship and store: It is administered in two doses given 28 days apart, has to be stored at temperatures of about minus 100 degrees Fahrenheit and will be delivered in dry ice-packed boxes holding 1,000 to 5,000 doses. These cartons can stay cold enough to keep the doses viable for up to 10 days, according to details provided by the company. The ice can be replenished up to three times. Once opened, the packages can keep the vaccine for five days but can’t be opened more than twice a day. The vaccine can also survive in a refrigerator for five days but can’t be refrozen if unused.