Cow’s milk allergy, also known as a cow's milk protein allergy, is a reaction to the proteins found in cow's milk. The symptoms can appear either immediately after consuming cow's milk - an IgE mediated reaction - or the reaction may be delayed by up to 48 hours, a non-IgE mediated reaction. Some babies may have both immediate and delayed reactions.
This is a companion discussion topic for the original article at https://patient.info/news-and-features/cows-milk-allergy-what-is-the-milk-ladder-in-children