Malnutrition 
EE causes malnutrition by way of both malabsorption and nutritional deficiencies.

Growth and physical development 
The first two years (and the prior 9 months of fetal life) are critical for linear growth.
Stunting is an easy to measure symptom of these child development deficits.

Neurocognitive (brain development) 
Effect on oral vaccination 
Many oral vaccines, both live and non-living, have proven to be less immunogenic or less protective when administered to infants, children or adults living in low socioeconomic conditions in developing countries than they are when used in industrialized countries.
Widespread EE is hypothesized to be a contributing cause for this observation.
Malnutrition 
EE causes malnutrition by way of both malabsorption and nutritional deficiencies.
Growth and physical development 
The first two years (and the prior 9 months of fetal life) are critical for linear growth. Stunting is an easy to measure symptom of these child development deficits.
Neurocognitive (brain development) 
Effect on oral vaccination 
Many oral vaccines, both live and non-living, have proven to be less immunogenic or less protective when administered to infants, children or adults living in low socioeconomic conditions in developing countries than they are when used in industrialized countries. Widespread EE is hypothesized to be a contributing cause for this observation.
Environmental enteropathy