Kati ya 1 na 5% ya baye bazui TB babelaka noki wuta bazui yango (Styblo et al., 1969; Sutherland et al., 1976; 1982). Wana babengaka yango kobela mbala moko, na Angle 'primary disease', mpe mbala mingi ezalaka na bana. 'Primary TB' mbala mingi ekoleka emonana te, mpe ekobika yango moko ata soki moto ameli nkisi te, kasi ekoki kozonga sima ya bambula. Ekotika elembo moke nakati ya tolo, na ndenge emonanaka na Rayon-X.