Spanish nurse : Another nurse assistant being observed for possible infection . Authorities are monitoring about 50 people . The nurse became first person to have Ebola outside Spain during this outbreak . Ebola has killed more than 3,400 people in West Africa , with more than 7,400 suspected , probable and confirmed cases . Doctors Without Borders Norwegian staffer has Ebola , report says .
Spanish nurse : Another nurse assistant being observed for possible infection . Authorities are monitoring about 50 people . The nurse became first person to have Ebola outside Spain during this outbreak . Doctors Without Borders Norwegian staffer has Ebola , report says .