According to allergist Dr. Juan Kothny Pommer, “in industrialized countries hay fever affects as much as 20 percent of the population, being more frequent in the cities. ”
Allergiaspetsialisti dr Juan Kothny Pommeri sõnul „vaevab heinapalavik tööstusmaades koguni 20 protsenti elanikkonnast, kusjuures kõige sagedamini esineb seda linnades ”.