GSTM1 and anemia (phenotype): In the absence of preventive measures, this exposure would have resulted in 2.41 million (95% credible interval 1.98-3.04 million) cases of moderate or severe anaemia (Hb < 9 g dl<sup>-1</sup>), including 600,000 (408,000-906,000) severe cases (Hb < 7 g dl<sup>-1</sup>).