You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old.
system
Скрытую пищевую аллергию обнаружили уже после открытия иммуноглобулинов класса Е - IgE.

Could you please translate this to English?
user
A hidden food allergy was discovered after the identification of immunoglobulins class E - IgE.

In simpler words: They found out about a secret food allergy when they learned about something called "IgE."
assistant