Another study from Papua, Indonesia found that infants aged 3 months or younger with vivax malaria were at higher risk of severe malarial anemia (Hb <5g/dL) than infants from the same population with falciparum malaria (odds ratio 2.4; 95% CI 1.0 to 5.9; p = 0.041) [12]. The gene discussed is GSTM1; the disease is Plasmodium vivax malaria.