University of Pittsburgh Jun 24 2026 Reviewed For many people with asthma, air-quality advisories are harbingers of worsening symptoms. But for reasons science has struggled to explain, the extent to which pollution exacerbates asthma varies widely from person to person. In a study published today in eBioMedicine , researchers from the University of Pittsburgh School of Public Health, in collaboration with the Severe Asthma Research Program (SARP), identified biological pathways that begin to