Studies performed in developing countries have reported that breastfeeding for long periods provides protection against infectious diseases in children.13,14 On the other hand, major differences have been observed between the results of similar studies on the same matter performed in developed countries.5,6,12,15, , -18 Regardless, breastmilk has been shown to include several protective factors such as immunoglobulins, lactoferrin, and lymphocytes, which in return has been associated with potential reductions in infant mortality also in developed countries.12 Here, LTF is linked to infectious disease.