LAGOS (Reuters) - When Liberian-American Patrick Sawyer collapsed at Lagos airport, he brought Ebola into a potentially ideal place for the deadly virus to spread - a vast, dirty, overcrowded city where tracing carriers and their contacts is a major problem.
Sawyer's arrival last month from Liberia - which along with Sierra Leone and Guinea lies at the centre of an outbreak that has killed more than 1,000 people - caught authorities in the Nigerian commercial capital unprepared.
