There is still risk involved in any kind of desensitization approach because it requires giving patients the very food that makes them react, she said.

CNN: 'Exciting' advance reported in peanut allergy therapy

But there are many unknowns about this treatment, and it's not clear how permanent the state of desensitization is, she said, and this immunotherapy method is not a cure.

CNN: 'Exciting' advance reported in peanut allergy therapy