For the ninth consecutive year the Asthma and Allergy Foundation of America has released its list of the worst cities in the nation for allergies. Researchers analyzed pollen levels, the number of allergy medications purchased per patient and the number of board-certified allergists per patient in the 100 largest metro areas in the U.S. Many of the 10 worst cities this year are concentrated in the Deep South, likely because the climate enables a longer spring season and a variety of pollen-producing plants and trees, allergists say.
(Matthew Brown/istockphoto)
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