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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(L-R) Abdulsalami Nasidi, Director of the Nigeria Center for Disease Control (NCDC), Lagos State Commissioner for Health Jide Idris, and Lagos Special Advisor on Health Yewande Adesina speak about the update on the Ebola outbreak during a news conference in Lagos, July 28, 2014.

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Medical personnel take care of Ebola patients at a clinic on the outskirts of Kenema, Sierra Leone, July 27, 2014.

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A health worker removes his protective suit as he emerges from an isolation area at the Medecins Sans Frontieres Ebola treatment center, in Kailahun, July 20, 2014.

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Medical staff working with Medecins Sans Frontieres (MSF) prepare to bring food to patients kept in an isolation area at the MSF Ebola treatment center, in Kailahun, July 20, 2014.