By feeding a child peanuts regularly between the ages of four months old and five years old.

If your child is older than 6 years and has peanut allergy, I would advise to think about “Aiimmune Palforzia” therapy. Perhaps it is available in your country. After 6 months maintenance phase you can switch to 2x M&Ms daily, instead of the palforzia maintenance dose. We have now completed two years with this therapy and my child can tolerate 5.5 peanuts instead of 0.1.