
Pfizer's COVID Vaccine Comes With a Chilly Complication. But That May Change.
Pfizer’s coronavirus vaccine candidate, announced earlier this month, comes with a major complication that could delay its distribution in rural areas and developing countries: It must be stored at the ultra-cold temperature of -70°C. That means the vaccine must be kept in specialized freezers that cost as much as $20,000 each and are rare outside of medical research facilities.