Individuals who serve as counters of the National Allergy Bureau (NAB) are required to become certified and to maintain their certification. The AAAAI certification program is administered through the AAAAI Aerobiology Committee.
This program requires candidates to successfully complete both a 70 question multiple choice exam and a slide identification exam. To be a pollen counter, an applicant must accurately identify and count pollen on an actual pollen slide. To be a mold counter, an applicant must accurately identify and count mold spores on an actual mold slide.
NAB stations counting molds and pollen grains operate with a volumetric air sampler, which are manufactured in England. Stations only counting pollen grains may operate with rotation impact samplers, which are manufactured in the U.S. or Canada.