Africa

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 surfaced in Lagos.

The authorities have confirmed that a Liberian man who died in Lagos last Friday tested positive for Ebola, Reuters reported.

After the discovery, the hospital that dealt with Nigeria's first known Ebola victim was closed.

Professor Sunday Omilabu, from Lagos University Teaching Hospital, told Reuters the health authorities are now tracing everyone who may have had contact with the victim.

(CNN) -- A doctor who has played a key role in fighting the Ebola outbreak in Sierra Leone is infected with the disease, according to that country's Ministry of Health.

Dr. Sheik Humarr Khan is being treated by the French aid group Medicins Sans Frontieres -- also known as Doctors Without Borders -- in Kailahun, Sierra Leone, Tim Shenk, an agency spokesman, told CNN.

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Published on Jul 10, 2014

Cities have always had to contend with things like natural disaster, economic and infrastructure collapse, and widespread illness. But globalization, climate change and rapid urbanization are making this moment in history different, and the stresses facing cities all the more complex. So how can cities survive, adapt, and grow, no matter what shocks might lie ahead? Join the Rockefeller Foundation's Judith Rodin for a look at what she calls "the resilience dividend" — investments that can minimize the disruptive effects of strain on a city, while simultaneously creating jobs, social cohesion, and equity.