When CO (250 parts per million; p.p.m.)was administered for 72 h, starting at day 2 after infection, it prevented death of P. berghei ANKA-infected DBA/2 mice by ALI (Figure 8A) without significant alterations in the parasitemia (Figure 8B) but with a significant impairment in the increase on the levels of VEGF in circulation (P<0.01; Figure 8B). This evidence concerns the gene VEGFA and infection.