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. 2020 Oct 26;8:570484. doi: 10.3389/fcell.2020.570484

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Copyright © 2020 Chen, Li, Lin, Huang, Lin, Chin, Lai, Chiu, Yang and Lai.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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PM_2.₅ exposure aggravated pneumococcus-induced lung inflammation. (A) Lung tissues were subjected to H&E staining. The magnified images were shown in the inset from each cropped area. (B) The stained tissues were examined and scored. PM, PM_2.₅ treatment; Sp, pneumococcal infection. Scale bar in each panel, 100 μm, and in each inset, 50 μm.