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Kwashiorkor: Kwashiorkor, also called protein malnutrition, condition caused by severe protein deficiency. Kwashiorkor is most often encountered in developing countries in which the diet is high in starch and low in proteins.

Goitre: The most common type of goitre is endemic goitre, caused by iodine deficiency. Iodine is an essential nutrient that is required for the production of thyroid hormone.

Night Blindness: Vitamin A deficiency, which causes reduced photosensitivity of rhodopsin (a chromoprotein) in rod cells, causes night blindness that is usually not severe, and vision most often recovers when adequate levels of the vitamin are administered.

Polio: Polio is an infectious disease especially of young children that is caused by the poliovirus.

Source: britannica.com