The Biden Administration has prioritized speed in its COVID-19 vaccine rollout. Also, a priority...distributing those doses to the populations most impacted by the coronavirus. Host Maddie Sofia talks with NPR science reporter Pien Huang about the challenges underserved communities face in getting the vaccine and the Biden Administration's plans to address vaccine equity in the pandemic.For more reporting on the COVID-19 vaccine, follow Pien on Twitter at @Pien_Huang. You can email the show at ShortWave@npr.org.