From: Childhood infections and asthma: at the crossroads of the hygiene and Barker hypotheses
In utero environmental factors | Postnatal environmental factors |
---|---|
Maternal diet | Infant diet (breast versus bottle) |
Maternal/fetal infections | Maternal smoking |
   Bacterial | Allergens |
   Viral | Endotoxin |
   Parasitic |    Daycare |
Maternal smoking |    Farm animals |
Allergens | Antibiotics |
Endotoxin | Â |