In this April 25, 2020 photo provided by IOM Niger, some of nearly 100 Nigeriens arrive in Assamaka, Niger, on foot from Algeria and now must be quarantined for two weeks at the remote Sahara border settlement, where water is scarce and midday temperatures reach over 110 degrees (45 degrees Celsius). Globally, coronavirus has marooned thousands of migrants in some of the world's harshest conditions on land and at sea. (IOM Niger via AP)
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