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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] Vitamin A plays a major role in phototransduction, so this deficiency impairs vision, often presenting ...
The data/colour given for the following former countries were assigned as follows: "Serbia and Montenegro": Serbia, Montenegro; The following groupings/assumptions were made: France includes the overseas departments as well as overseas collectivities. The United Kingdom includes the Crown dependencies as well as the overseas territories.
Vitamin A deficiency has been linked to compromised resistance to infectious diseases. [33] [34] In countries where early childhood vitamin A deficiency is common, vitamin A supplementation public health programs initiated in the 1980s were shown to reduce the incidence of diarrhea and measles, and all-cause mortality.
"Vitamin A will reduce measles mortality, and this is especially in low-to middle-income, resource-limited countries where vitamin A deficiency and malnutrition is very common," Dr. Tina Tan ...
In 28 countries, at least 30% of children were still affected by stunting in 2022. [33] Vitamin A deficiency affects one third of children under age 5 around the world, [34] leading to 670,000 deaths and 250,000–500,000 cases of blindness. [35] Vitamin A supplementation has been shown to reduce all-cause mortality by 12 to 24%. [36]
However, vitamin A is most useful for measles support in patients who have a specific deficiency. The studies mainly draw on evidence from low-income countries where that deficiency is common.
The CDC recommends daily doses of vitamin A at 50,000 IU for infants younger than 6 months of age, 100,000 IU for infants 6 to 11 months of age, and 200,000 IU for children 12 months of age and older.
India, a largely vegetarian country and second largest country in the world by population, contributes most number in malnutrition in the region. The 2006 report mentioned that "the low status of women in South Asian countries and their lack of nutritional knowledge are important determinants of high prevalence of underweight children in the ...