Anaemia affects 25% of world population, mainly pregnant women and children in low development count
"In absolute numbers anaemia affects 1.62 billion people globally with about 293 million children of preschool age, 56 million pregnant women, and 468 million non-pregnant women estimated to be anaemic."
Source: Ministry of Health and Family Welfare, Government of India, Adolescent Division, Anuradha Gupta, Rakesh Kumar, Virender Singh Salhotra, Anshu Mohan, and Sheetal Rahi, "Guidelines for Control of Iron Deficency Anaemia," 5, May 27, 2015, http://www.pbnrhm.org/docs/iron_plus_guidelines.pdf