FIGURE 2-1. International tourist arrivals by region (in millions), 1950–2020.

FIGURE 2-1International tourist arrivals by region (in millions), 1950–2020

SOURCE: Reprinted with permission from UNWTO (2008a).

From: 2, Travel, Conflict, Trade, and Disease

Cover of Infectious Disease Movement in a Borderless World
Infectious Disease Movement in a Borderless World: Workshop Summary.
Institute of Medicine (US) Forum on Microbial Threats.
Washington (DC): National Academies Press (US); 2010.
Copyright © 2010, National Academy of Sciences.

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