When the logistic regression analysis was adjusted by sex, age and infection, we found that a decrease in the percentage of DNAM-1+NK cells, 2B4+NK cells, NTBA+NK cells, and SLAMF7+ NK cells, as well as a decrease in their expression levels on NK cells, were associated with lymphoblastic acute leukemia during childhood at the moment of ALL diagnosis (Table 2). This evidence concerns the gene SLAMF7 and infection.