An allergist is a physician that specializes in the identification and therapy of asthma along with other infectious diseases. The allergist is trained to recognize the things that cause allergies or asthma. Allergists help individuals stop or treat their allergy issues. The allergist completes three or two years of research within the specialty of immunology and allergy. You can be sure that these needs have been fulfilled with by your physician if she or he is a registered allergy specialist.