Vaccination deployment should be dependent on the prevalence of the virus in a zone (i.e., a predefined geographical area). Red zones should focus on vaccinating people at risk and health workers to reduce fatalities and keep hospitals operational. On the other hand, green zones should also focus on vaccinating inter-zone travelers and highly central individuals to reduce the risk of re-importation and keep virus circulation near zero. This difference is motivated by the absence of community transmission in green zones. The efficacy of this policy relies on travel restrictions between red and green zones as have been introduced in and between several countries during the course of the pandemic. Here are several highlights for Terra Nova by the experts Miquel Oliu-Barton and Bary Pradelski.