Where is the common setting to contract rickets?

Low Vit D: Vitamin d or calcium deficiency can lead to rickets. These days rickets is most often seen in the setting of childhood malnutrition. Risk factors include being black (blacks require more sunlight to synthesize the proper form of vit d) and being breastfed. Other environments where it can be seen is countries where food is not supplemented with vit d and in those with very low sunlight exposure.

Vitamin D deficiency: Severe vitamin d deficiency in young children can cause rickets. Rickets leads to under and de-mineralization of bone. Vitamin d deficiency is very common in the us. Particularly in those who are breast fed, vitamin d should be supplemented as it does not pass through breast milk in any significant quantity. There are other causes for rickets, but vitamin d deficiency is the most common.