Doctors Without Borders says the death toll may be even higher . The contamination comes from miners ' efforts to extract gold from ore . We are focusing on treatment of children under 5 but the most important thing is the remediation , or clean-up , so the exposure can stop , '' she added . The clean - up involves removing contaminated soil and replacing it with clean soil .
Doctors Without Borders says the death toll may be even higher . The contamination comes from miners ' efforts to extract gold from ore . The clean - up involves removing contaminated soil and replacing it with clean soil .