Lead Sponsor

Fundacion Infant

Age

0 - 0 years

Sex

ALL

Healthy Volunteers

No

•VLBW preterm neonates (birth weight \<1,500 g at birth; gestational age \<37 weeks) born alive at any of the two participating maternity hospitals integrating our network in Argentina will be enrolled in the study after signature of informed consent.

•VLBW infants older than one month of age (e.g.: transferred from another institution), or formula fed for over ten days, or with congenital heart disease, congenital anomalies of the respiratory tract (i.e.: tracheoesophageal fistula, pulmonary hypoplasia, diaphragmatic hernia), immune suppression, severe malformations affecting breathing (i.e. anencephaly) as well as infants who die prior to completion of the first questionnaire, or living more than 40 km away from the Hospital will be excluded from participation. Infants born from human immunodeficiency virus (HIV) positive mothers will also be excluded