1 out of 14. Anemia is most likely in older infants. It is present in about 1 out of 14 children 1-2 years old. The us preventive services task force recommends routine iron supplements in 6-12 month old infants, through oral iron or iron-fortified formula, if high risk (low birth weight, prematurity, and breast-feeding). It is not clear if screening by testing blood in infants is helpful.