There is an increased risk of deficiency not just in certain regions of Africa and southeast Asia, some parts of the Middle East but also in half of all the countries in the world. The more severe cases are seen in infants, young children, pregnant women, and old age citizens.
This reason is because of the deficiency in intake of the mineral Vitamin A. It is a major issue in developing countries but not so much in already developed countries. The lack of this mineral gives rise to various diseases like measles, diarrhea, night blindness, etc of which the former might is the most deadly.
Lack of dietary knowledge and awareness, and social and cultural habits are some other factors that lead to such results.
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