Mayor Bill de Blasio says he's very confident that the city's hospital system could handle an Ebola outbreak as concerns grow over the spread of the deadly virus. 

De Blasio touted local hospitals as having a "much more aggressive and coherent game plan" to fight a potential Ebola case compared to other U.S. cities. 

Public hospitals across the city have even been secretly sending actors with mock symptoms into emergency rooms to test how good the triage staff is at identifying and isolating possible cases. 

Meanwhile, President Barack Obama says the nation will be working on ways to conduct additional passenger screenings for the Ebola virus after meeting with public health officials in Washington. He stressed that the chances of an outbreak in the U.S. are very low. 

A nurse in Spain has become the first person known to have contracted Ebola outside of West Africa. The nurse was part of a team that treated two missionaries flown home to Spain after becoming infected in Liberia.