STRONGBRANDS    Professor Tim Calkins, Kellogg School of Management

Health workers in protective gear wheel a stretcher into a hospital with one of two Spaniards who were repatriated from Liberia, shortly after their arrival in Madrid, August 7, 2014. Spain repatriated Miguel Pajares, 75, a priest working in West Africa who has tested positive for the Ebola virus, and a nun who is a Spanish national from Equatorial Guinea, Julian Bohi, who has not tested positive for the virus but has been exposed to Ebola, local media said. Ebola, one of the deadliest diseases known to humans, has killed nearly 900 people in West Africa since February and is still spreading fast. There is no known cure and no vaccine to protect against the disease. REUTERS/Ignacio Gil-ABC (SPAIN – Tags: DISASTER HEALTH TPX IMAGES OF THE DAY) MANDATORY CREDIT. SPAIN OUT. NO COMMERCIAL OR EDITORIAL SALES IN SPAIN