1. Global coordination on cross-border travel and trade measures crucial to COVID-19 response;Lee;Lancet,2020
2. Evaluating the Economic Consequences of Avian Influenza(1);Burns,2008
3. The Inclusive Cost of Pandemic Influenza Risk;Fan,2016
4. The Impact of COVID-19 on Global Air Passenger Traffic in 2021,2022
5. Rich nations stockpiling a billion more COVID-19 shots than needed -report;Kelland;Reuters,2021