Evolution problems

Allergy to cow's milk has become an important health problem in the beginning of XX century, when the mass production of children milk mixtures. In those days believed that milk formula should be used only in cases where breastfeeding is for any reason impossible. Unfortunately, modern women rarely remember this original ideas. The use of milk mixtures, prepared on the basis of cow's milk, received for various reasons so widespread that most children, especially in developed countries, never even tried the food, created for them by nature *. Three decades ago in the United States about 65% of women after childbirth was breastfeed [17]. In the early 70-ies, only 28% of infants aged 1 week received breast feeding and newborns at the age of 2 weeks, this percentage fell to 15 [2]. In England, the percentage of children who were breast-fed, fell from 60 in 1948 to 40 in 1969 [3]. In Canada in 1973 35% of children were breastfed during the 1st week of life, 17% -within 3 months, and 6% -within 6 months [4].
Decreasing prevalence of breast-feeding has increased the number of illnesses in children receiving milk [5]. The allergologists and pediatricians have long known about the increasing number of cases of allergies in children under 2 years. In this age, the child most frequently in contact with the allergens in the food, and the list of these allergens cow's milk occupies the first place [6-9]. K. Bachman and S. sound way (1957) noted hypersensitivity to cow's milk in 30% of the 109 of allergic children under 2 years of age [10]. This fact is not surprising for two reasons. First, cow's milk contains over 25 different proteins that can be antigens in children. Secondly, it has become a common component of the daily diet of people of any age. In some countries the consumption of milk in quantity exceeds the consumption of any food product, and in many countries it is second only to the bread and rice.

* In the Soviet Union, the vast majority of children taking breast milk. - Note. Ed.