Experiments have found that proper vitamin D supplementation for pregnant women can reduce the risk of neonatal infection with respiratory syncytial virus  Researchers tested the content of vitamin D in umbilical cord blood of 156 newborns  Among them, 54% of newborns were diagnosed with vitamin D deficiency  Among them, 12% of the children were infected with respiratory syncytial virus within one year after birth
Vitamin D has a variety of disease prevention and health functions, including improving the function of the immune system, promoting the development of the neonatal respiratory system, and preventing neonatal respiratory virus infections
 The proportion is much higher than that of children with normal vitamin D