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. 2020 May 7;186:109639. doi: 10.1016/j.envres.2020.109639

Fig. 3.

Fig. 3

Fig. 3

a: Confirmed infection cases, versus the detection day, and corresponding PM10 concentration values, for Brescia, Bergamo, Milano, Monza-Brianza, Cremona, Lodi, and Pavia. Based on the reported results of all the considered area the upper limit of PM10 scale was settled to 100 μg/m3 3 b: Confirmed infection cases, versus the detection day, and corresponding PM10 concentration values, for Asti, Torino, Alessandria, Biella, Novara, and Vercelli. Based on the reported results of all the considered area the upper limit of PM10 scale was settled to 100 μg/m3.