Figure 4
From: Framework for assessing and easing global COVID-19 travel restrictions
(a) Airline traffic network of countries in the top 5\(\%\) of mutual global airline travel volume in the first two weeks of June 2020. Each node corresponds to a country and thicker edges carry more travel. (b) Heat map of empirical travel volume in the first two weeks of June 2020 (compared to the first two weeks of June 2019), and (c) heat map of hypothetical travel volume in the first two weeks of June 2020 under our proposed policy (compared to the first two weeks of June 2019).
