Two studies today describe US COVID-19 vaccination disparities, one evaluating vaccine allocation plans aimed at reducing distribution differences, and the other revealing urban versus rural inequities.Structural, systemic racismThe first study, led by University of Pennsylvania at Philadelphia researchers and published in Nature Medicine, involved analysis of COVID-19 vaccine allocation plans provided by the Centers for Disease Control and Prevention's (CDC's) 64 jurisdictions, which consist of 50 states, five large cities, eight territories, and Washington, DC.The CDC requested that all jurisdictions provide vaccine allocation plans by Oct 31, 2020.