Accordingly, Hb levels were significantly lower (p = 0.032) in cavitary TB disease (Figure 1F) and Hb levels were also lower in underweight TB patients with a BMI ≤ 18.5 (p = 0.044) and a MUAC ≤ 21 (p < 0.0001) (Figure 1G,H). The gene discussed is GSTM1; the disease is tuberculosis.