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In 1987, the World Health Organization (WHO) estimated that vitamin A deficiency was endemic in 39
countries based on the ocular manifestations of xerophthalmia or deficient serum (plasma) retinol  concentrations (< 0.35 μmol/L). In 1995, WHO updated these estimates and reported that vitamin A deficiency was of public health significance in 60 countries, and was likely to be a problem in an additional 13 countries. The current estimates, detailed in this publication, reflect the time period between 1995 and 2005, and indicate that 45 and 122 countries have vitamin A deficiency of public health significance based on the prevalence of night blindness and biochemical vitamin A deficiency (serum retinol concentration < 0.70 μmol/L), respectively, in preschool-age children.

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Key Details

Year 2009
Authors
Language English
Keywords
DOI https://doi.org/10.52439/QMZI8841
DOI Number 10.52439/QMZI8841
ISBN
ISSN

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