[The effect of breast feeding on morbidity in children].
The authors investigated in a group of 4210 children from birth to three years from Southern Moravia the morbidity from respiratory infections, diarrhoea and other infections. There were bisexual differences in morbidity, girls were less frequently ill. Children from child communities had a two old morbidity. Birth order was also important. The influence of natural nutrition was apparent in particular during the first year when infants breastfed for more than 4 months had significantly fewer spells of illness. These results were influenced by sex and birth order. At the age of two and three years the differences between children breastfed for a short and long time disappeared. Similar results were found also in other morbidity indicators such as administration of antibiotics, number of hospital admissions and mean number of days spent in hospital.