Around 1% of children have cow’s milk allergy, but up to 14% of families believe their child have it. The authors point to official guidelines for detecting cow’s milk allergy as a possible cause for the overdiagnosis. AND ... (1) https://jamanetwork.com/journals/jamapediatrics/article-abstract/2764081

Three Cows Milk Allergy guidelines were directly supported by formula manufacturers or marketing consultants, and 81% of all guideline authors reported a conflict of interest with formula manufacturers. So the companies make a fortune from special milks babies don't need. (2)