Anyone can have an anaphylactic reaction, but the likelihood of a child having an anaphylactic reaction is greatly increased if one or both parents are allergic. If neither parent has an allergy, the chance of a child having an allergic reaction is 13%, if one parent has an allergic reaction, the chance of a child having an allergic reaction is 20%, if both parents have an allergic reaction the chance of a child having an allergic reaction is 43%, and if both parents have an allergic reaction with the same symptoms the chance of a child having an allergic reaction is as high as 72%, with a global prevalence rate of allergic diseases of 20 The global prevalence of allergic diseases is 20%.