Six months longitudinal abservation infant's morbidity was carried out on the Exclusively Breast-fed (EBF) and Non Exclusively Breast-fed (NEBF) cohorts. Babies born in Kariadi Hospital Semarang with normal birth weight, vigorous, singleton, full term, were included in the study. Those suffering from neonatal infection, jaundice and severe congenital anomaly were exluded. Some potential cofound…