To the north are the Chukchi and Beaufort seasâthe southern parts of the Arctic Ocean. The Pacific Ocean lies to the south and southwest. Alaska is the largest state in the United States by area, the 3rd least populous and the least densely populated of the 50 United States.
Vitamin A deficiency (VAD) is a lack of vitamin A in humans. It is common in poorer countries but rarely seen in more developed countries.Nyctalopia (night blindness) is one of the first signs of VAD.revalence of vitamin A deficiency. Vitamin A deficiency (VAD) is a lack of vitamin A in humans. It is common in poorer countries but rarely seen in more developed countries. Nyctalopia (night blindness) is one of the first signs of VAD.
Definitions of Vitamin A deficiency: Condition due to a deficiency of vitamin A. - (Source-Diseases Database). Vitamin A deficiency is listed as a  rare disease  by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH).This means that Vitamin A deficiency, or a subtype of Vitamin A deficiency, affects less than 200,000 people in the US population.efinitions of Vitamin A deficiency: Condition due to a deficiency of vitamin A. - (Source-Diseases Database). Vitamin A deficiency is listed as a  rare disease  by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH).