Internists or pediatricians who wish to focus on the sub-specialty of allergy-immunology then complete at least an additional two years of study, called a fellowship, in an allergy/immunology training program.
Allergist/immunologists who are listed as ABAI-certified have successfully passed the certifying examination of the American Board of Allergy and Immunology (ABAI), following their fellowship.
[2] In the United States physicians who hold certification by the American Board of Allergy and Immunology (ABAI) have successfully completed an accredited educational program and an evaluation process, including a secure, proctored examination to demonstrate the knowledge, skills, and experience to the provision of patient care in allergy and immunology.
A 2003 Royal College of Physicians report presented a case for improvement of what were felt to be inadequate allergy services in the UK.
[5] The American Academy of Allergy, Asthma & Immunology (AAAAI) has an international physician referral directory of allergist/immunologist members of the organization here.