Throughout the COVID-19 crisis, nation states found new ways to assert power under the guise of public health, from closing or tightening borders to expanding the boundaries of acceptable citizen surveillance. As these controls increased in intensity, citizens’ passions to cross borders seemed to grow in proportion. Pandemic Crossings explores how these processes of boundary making and crossing, often mediated by digital technology despite inequity of access, had profound and often contradictory consequences on individual lives, national politics, and U.S.–China relations. This rich and geographically diverse collection of studies informed by everyday, individual experiences contribute new insights to the interplay between digital technologies and state governance during the covid-19 pandemic. It opens up new avenues of research not only on the covid-19 pandemic but also on global health crises more broadly.