veera ♡’s Reviews > Allergic: Our Irritated Bodies in a Changing World > Status Update

They discussed the history of discovering allergies and described the biological mechanisms underlying them. These weren't difficult to understand as it's the same as what they teach you in A level biology. However, it was really interesting to me to see how fluid the definition of allergies were, and how misconceived they are by even top allergists. Also, the reality of how recent this research was freaked me out.