Fig. 2. Correlations between atmospheric concentrations (red bar) and allergic sensitization rates (blue line) to Alternaria in Seoul (A) and Guri (B). In Seoul, allergic sensitization rates to Alternaria were 3.5% and 0.2% in 1998 and 2022, respectively; in Guri, the rates were 3.8% and 0.3%, respectively.