Nigerian health authorities are in the process of tracing more than 30,000 people who could be at risk of contracting Ebola, after the virus recently surfaced in Lagos.
Ebola Developments
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Medical staff working with Medecins Sans Frontieres (MSF) put on their protective gear before entering an isolation area at the MSF Ebola treatment center, in Kailahun, Sierra Leone, July 20, 2014.
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A health worker with disinfectant spray walks down a street outside the government hospital in Kenema, Sierra Leone, July 10, 2014.