Pediatric allergy-immunology is the field of medicine that deals with problems caused by allergies and other disorders of the immune system. A pediatric allergist-immunologist evaluates, diagnoses, and manages disorders of the immune system in infants, children and adolescents. Some conditions that this specialist treats include asthma, rhinitis, eczema, and allergic reactions to drugs, foods and insect bites. Other areas covered by an allergist-immunologist are immune deficiency diseases, problems related to autoimmune diseases, and organ transplantation.

Doctor density varies by specialty and location. Illinois has 30 practicing pediatric allergy and immunologists. Broken out by city, pediatric allergy and immunology doctor density in Arlington Heights is 3, in Aurora is 2, in Barrington is 1, in Bloomingdale is 1, in Bloomington is 1, in Burr Ridge is 2, in Carol Stream is 1, in Chicago is 16, in Cicero is 1, in Danville is 1, in Decatur is 1, in Downers Grove is 1, in Effingham is 1, in Evergreen Park is 1, in Flossmoor is 1, in Glen Ellyn is 1, in Hinsdale is 1, in Libertyville is 1, in Lombard is 4, in Mattoon is 1, in Maywood is 1, in Naperville is 4, in Niles is 1, in Oak Brook is 1, in Oak Forest is 1, in Oak Lawn is 1, in Oakbrook Terrace is 1, in Palos Heights is 2, in Park Ridge is 1, in Rockford is 1, in Shelbyville is 1, in Springfield is 1, in Tuscola is 1, in Urbana is 1, in Warrenville is 1, in Willowbrook is 1, and in Winfield is 2.

Most people think that Chicago, because of its size and popularity, is Illinois’ capital city, but that distinction belongs to Springfield, home of the Abraham Lincoln Museum. Illinois has hundreds of museums, numerous yearly art and ethnic festivals, a lakeshore bordering Lake Michigan, and the many national forests and parks that offers visitors camping, horseback riding, biking, kayaking, and fishing. Chicago is home to the Sears Tower, the Shedd Aquarium, the Art Institute of Chicago, the Adler Planetarium, the Museum of Science and Industry, and other cultural opportunities and restaurants in the Navy Pier area.

According to 2005 Census estimates, Illinois has a population of 12,763,371. Of this population, 3,172,677 are under the age of 18 and 1,523,937 are at or above the age of 65.