Genetic testing showed they were infected with a strain that originated in northern Nigeria , traveled west through Chad and Sudan , and crossed the Red Sea early this year .
Sudan /location/location/contains Red Sea
Red Sea /location/administrative_division/country Sudan
Sudan /location/country/administrative_divisions Red Sea
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Sudan
LOCATION
Red Sea
LOCATION
/location/location/contains
Red Sea
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Sudan
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Sudan
LOCATION
Red Sea
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