Increases of 12% in incidence of upper respiratory tract illness, 19% in asthma, and 26% in rhinitis were associated with the increase in PM10 levels from 50–150 μg/m3 .
Increases of 12% in incidenceof upper respiratory tract illness, 19% in asthma, and 26% inrhinitis were associated with the increase in PM10 levels from50–150 μg/m3.