The battle against a massive and deadly outbreak of dengue continues Monday, but obstacles remain in at least one sprawling neighborhood.
The mosquito that transmits the disease lives and breeds in pools of stagnant water around the Caxias community, rife with squalor and crime. Standing water makes Caxias a key front in the battle against an epidemic that has killed at least 67 people, affected 55,000 and prompted the Brazilian military to join the fight.
Yet combatting the disease is no easy matter in Caxias, which is home to thousands. It is also considered one of the most dangerous neighborhoods in Rio de Janeiro. 
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All About Brazil • Centers for Disease Control and Prevention