Fortunately, these sort of nutritional deficiencies are not seen in most countries nowadays, but once the world had to struggle with a high prevalence of vitamin deficiencies. Scurvy was one of the more common ones due to Vit C being essential for humans and famines being so common. However, some other deficiencies, especially those of Vit B (B1 and B12 especially) are still seen, even in developed countries.

Great post!