A worker in protective clothing stands outside the entrance of the apartment building of the nurse who contracted Ebola, in Alcorcon, outside Madrid, October 8, 2014. Spanish health authorities said on Wednesday that another person being monitored in Madrid for Ebola had tested negative for the disease. The man, a Spaniard who had travelled from Nigeria, was one of several people hospitalised after authorities confirmed on Monday that a Spanish nurse had caught the disease in Madrid. REUTERS/Susana Vera (SPAIN - Tags: HEALTH SOCIETY)