The WHO recommendation that children should be exclusively breastfed from
4-6 months and continue to be breastfed for up to two years and beyond has
been part of their infant feeding recommendations for many years and is
published in many different places.
Katherine A. Dettwyler, Ph.D.
Associate Professor
Department of Anthropology and Nutrition
Texas A&M University
Co-editor of "Breastfeeding: Biocultural Perspectives"