A Senegalese hygienist demonstrates how to protect oneself against the Ebola virus on April 8, 2014 at Dakar airport, during a visit of the Senegalese health minister to check the safety measures put in place to fight against the virus' spread in western Africa. West Africa's Ebola outbreak is among the "most challenging" ever to strike since the disease emerged four decades ago, the World Health Organisation (WHO) said on April 8, as the suspected death toll from the virus hit 111. AFP PHOTO / SEYLLOU (Photo credit should read SEYLLOU/AFP/Getty Images)
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AFP SEYLLOU