Ebola center in Sierra Leona under guard after protest march

Health workers take blood samples for Ebola virus testing at a screening tent in the local government hospital in Kenema, Sierra Leone, June 30, 2014. REUTERS/Tommy Trenchard

Health workers take blood samples for Ebola virus testing at a screening tent in the local government hospital in Kenema, Sierra Leone, June 30, 2014. REUTERS/Tommy Trenchard

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