The Race Between the Vaccine and the Variants 2021-03-23
![](https://media.wnyc.org/i/800/0/c/85/2021/02/vaccines.png)
Doses of the Pfizer-BioNTech COVID-19 vaccine stored in an ultra-cold freezer at NYC Health + Hospitals Metropolitan, February 18, 2021.
( MARY ALTAFFER/AP/SHUTTERSTOCK )
( MARY ALTAFFER/AP/SHUTTERSTOCK )