Philadelphia^[1] has once again been named one of the “asthma capitals” of the U.S. – ranking No. 4 in a report released on Sept. 9, 2025, by the Asthma and Allergy Foundation of America^[2]. Allentown was ranked No. 3, Harrisburg No. 15 and Pittsburgh No. 44.

The AAFA, which is the largest patient group in the country for people with asthma and allergies, ranks cities based on “how challenging they are to live in...