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Race in America
The migrant crisis
By Holly Honderich
BBC News, Washington
Public health expert Dr Ashish Jha says the threat posed by the coronavirus variant is not yet clear.
BBC Middle East Editor Jeremy Bowen meets terrified children running from civil war and 'ghosts' in Yemen.
The governor of the US state of Texas has accused President Joe Biden of allowing illegal migration from South Africa.
"Biden is doing nothing to stop immigrants from South Africa entering illegally," Greg Abbott, a critic of the US leader, tweeted.
Over the weekend, Mr Biden banned travel from southern African countries over fears of the new Omacrion coronavirus, which was detected in South Africa.
Mr Abbott accused Mr Biden of "playing politics".
Texas, which borders Mexico to the south, has been a key crossing point for migrants, mostly from South America but including some from African countries.
According to an AP report in 2019, most African migrants detained in Texas were from the Congo-Brazzaville, the Democratic Republic of the Congo and Angola and Cameroon.
By The Visual and Data Journalism Team
By James McCarthy