Vitamin A supplementation in infants and children 6–59 months of age. We working for the 620 children confirm vitamin A+ capsule dose. A deficiency is a public health problem** (prevalence of night blindness is 1% or higher in children 24–59 months of age or where the prevalence of vitamin A deficiency (serum retinol 0.70 µmol/l or lower) is 20% or higher in infants and children 6–59 months of age), high-dose vitamin A supplementation is recommended in infants and children 6–59 months of age.