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. 2021 Mar 19;60(1):188–204. doi: 10.1111/imig.12838

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© 2021 The Author. International Migration © 2021 IOM

This article is being made freely available through PubMed Central as part of the COVID-19 public health emergency response. It can be used for unrestricted research re-use and analysis in any form or by any means with acknowledgement of the original source, for the duration of the public health emergency.

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(A) Overview of Undocumented Migrants. (B) Percentage of undocumented migrants to legal guest workers. Source: Both Figure 1a,b are adopted from unpublished statistical data from the General Bureau of Passport and Naturalisation cited in al‐Mutayrī (2012).