[Flavio da Silva resting after an asthma attack, Rio de Janiero]

[Mario and Flavio da Silva at Copacabana Beach, Rio de Janeiro]

[Mario da Silva crying after being bitten by a dog, Rio de Janeiro]

[Flavio da Silva and his brother Mario on the boardwalk during their first trip outside the favela, Rio de Janeiro]

[Fever division department in trucks, Rio de Janeiro]

[Man inspecting water container, Rio de Janeiro]

[Testing for yellow fever mosquitos, Rio de Janeiro]

[Woman carrying container with child, Rio de Janeiro]

[Man in uniform carrying containers, Rio de Janeiro]

[Isabel da Silva crying after vainly seeking comfort from her exhausted father, José, Rio de Janiero]

[Fever division department carrying ladders, Rio de Janeiro]

[Flavio da Silva making his bed, Rio de Janeiro]

[Flavio da Silva resting after an asthma attack, Rio de Janiero]

[Flavio da Silva feeding his brother Zacarias, Rio de Janeiro]

[Mario da Silva crying after being bitten by a dog, Rio de Janeiro]

[Flavio da Silva pouring water into the family's cooking pot, Rio de Janeiro]

[The da Silva family, the parents and five children in one bed, the other two in the crib, asleep in the largest room of their shack, Rio de Janiero]

[Departure of a fever division department on its way to inspect water containers, Rio de Janeiro]

[Departure of a fever division department on its way to inspect water containers, Rio de Janeiro]

[Zacarias da Silva playing in the dirt and garbage beneath his family's shack, Rio de Janeiro]