Among children aged 6–59 months, 42% were anaemic: 25% had mild anaemia (10 g/dl ≤ Hb < 11 g/dl), 17% had moderate anaemia (7 g/dl ≤ Hb < 10 g/dl), and fewer than 1% had severe anaemia (Hb < 7 g/dl). The gene discussed is GSTM1; the disease is anemia (phenotype).