Is Breastfeeding For 2 Years Normal?

Is Breastfeeding For 2 Years Normal? Like the AAP and WHO, the American Academy of Family Physicians (AAFP) recommends continuing to breastfeed for at least 1 year, and says that the health of moms and babies is optimal “when breastfeeding continues for at least 2 years.” Why does the WHO recommend breastfeeding for 2 years?