Melissa Kabore, 4, stands with her mother in Pissy informal granite quarry, since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Oumeima Ouedraogo, 7, crashes stones next to burning tires at the Pissy informal granite quarry since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Neimatou Ouedraogo, 9, carries a bucket of water in Pissy informal granite quarry, since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault

Melissa Kabore, 4, holds her doll while she walks though the Pissy informal granite quarry, since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

A woman carries stones out of first rain puddle in Pissy informal granite quarry, amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault TPX IMAGES OF THE DAY

Women break stone blocks in Pissy informal granite quarry, amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault

Salamata Sama, 36, feeds her 18-month girl at the Pissy informal granite quarry, amid the outbreak of the coronavirus disease (COVID-19) in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault

Pascaline Nikiema, 33, carries stones on her head in Pissy informal granite quarry, amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault

A child's toy is seen on a rock at the Pissy informal granite quarry since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

A mother looks at her crying girl in Pissy informal granite quarry, amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Abdou Fatao Pafadenam, 11, wraps stone blocks in his t-shirt in Pissy informal granite quarry since schools closed, amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Melissa Kabore, 4, holds her doll while she walks though the Pissy informal granite quarry, since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

A general view of the Pissy informal granite quarry pit, amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault TPX IMAGES OF THE DAY

Samira Kabore, 10, carries stone blocks on his head in Pissy informal granite quarry since schools closed amid the outbreak of the coronavirus disease (COVID-19) in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

A young child breaks granite stone at the Pissy informal granite quarry since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault

Samira Kabre, 13, and Oumou Kabore, 8, climbs up the pit with crushed stones on thier heads at the Pissy informal granite quarry since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault

Children's feet blacked with the ashes of burned tires are pictured in Pissy informal granite quarry, since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Ali Nana, 8, plays with friends on used tires in Pissy informal granite quarry, since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Melissa Kabore, 4, jumps over a puddle in Pissy informal granite quarry, since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Children carry stones on their head in Pissy informal granite quarry since schools closed, amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault