Camargo et al. also suggested that cord-blood levels of
25(OH)D are inversely associated with the risk of respiratory
infection and childhood wheezing, but not with incident asthma
[16]. In a recent study, vitamin D deficiency also was
reported to be common in sick children admitted to pediatric
intensive care units [8, 21, 22]. Treatment and preventation of
RRI are important since RRI causes morbidity in childhood.
These studies together with the index study show a possible
contribution of vitamin D deficiency as a risk factor for recurrent
infections and support the theory that vitamin D supplementation
could be a part of strategies to prevent early childhood
infections