This unrecognised health burden is on the scale of malaria or tuberculosis, a new report has found .... In 2010, doctors from Doctors Without Borders(MSF) carrying out vaccinations in villages in Zamfara were shocked to see so few children ...... The villagers were small-scale gold miners who crushed gold-bearing rocks inside village compounds.

The raw ore contained extremely high levels of lead, which had killed hundreds of children and left thousands more with lead poisoning ...The health effect of exposure to toxins at the 2600 sites identified in the report was estimated using the disability-adjusted life years metric...The estimate for the effect of pollution from toxic sites is 17-million disability-adjusted life years; according to the health organisation, malaria's annual toll is 14-million disability-adjustedlife years... 

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