The intensification of globalization in recent decades has numerous consequences for health promotion and healthcare provision worldwide. In our research, we have been exploring the health consequences of the increased demand for an itinerant workforce across national borders. The mobility demands of economic markets frequently clash with nations' migration and citizenship laws resulting in millions of workers who lack the legal authority to reside and work in a foreign country. Undocumented migration is the fastest growing form of migration worldwide, now reaching 15-20% of the total number of global migrants, or about 30-40 million people (Papademetriou 2005).
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