sentences:  The NAB is part of the AAAAI's Aeroallergen Network, and consists of pollen and spore counting stations staffed primarily by AAAAI member volunteers.They provide pollen and mold counts from approximately 80 counting stations throughout the United States, two counting stations in Canada, and two in Argentina.Each year, academic and clinical leaders attend the AAAAI Annual Meeting, which showcases new research and discuss other developments in the areas of allergy, asthma and immunology.