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Prevalence of vitamin A deficiency, 1995-2005. Vitamin A deficiency (VAD) or hypovitaminosis A is a lack of vitamin A in blood and tissues. [1] It is common in poorer countries, especially among children and women of reproductive age, but is rarely seen in more developed countries. [1]
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For example, in the United States of America, one out of every six children is at risk of hunger. [citation needed] A study, based on 2005–2007 data from the U.S. Census Bureau and the Agriculture Department, shows that an estimated 3.5 million children under the age of five are at risk of hunger in the United States. [28]
The causes are vitamin A deficiency during pregnancy, followed by low transfer of vitamin A during lactation and infant/child diets low in vitamin A or β-carotene. [ 22 ] [ 19 ] The prevalence of pre-school age children who are blind due to vitamin A deficiency is lower than expected from incidence of new cases only because childhood vitamin A ...
Another estimate also by WHO states that childhood underweight is the cause for about 35% of all deaths of children under the age of five years worldwide. [ 6 ] According to a 2008 review, an estimated 178 million children under age 5 are stunted , most of whom live in sub-Saharan Africa. [ 15 ]
Even among adults without conditions that may be associated with iron deficiency – anemia, heart failure, chronic kidney disease or pregnancy – the estimated prevalence of absolute iron ...
Clinical vitamin A deficiency is particularly common among pregnant women, with prevalence rates as high as 9.8% in South-East Asia. [ 120 ] Estimates say that 28.5% of the global population is iodine deficient, representing 1.88 billion individuals. [ 124 ]
Drought conditions have gripped nearly the entire country, with only one state spared as a bone-dry autumn left most states parched. In November, Kentucky became the 49th state to cross into ...