Fine particulate matter 2.5 induces susceptibility to Pseudomonas aeruginosa infection via expansion of PD-L1^high neutrophils in mice.

"Declarations Ethics approval and consent to participateAll animal experiments were performed and approved in accordance with the guidelines of the Institutional Animal Care and Use Committee in Southwest Jiaotong University. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This work was supported by the National Natural Science Foundation of China (82370022, 82370023, and 82200079), the National Key Clinical Specialist Construction Project (2023031 L), Natural Science Foundation of Sichuan (2022NSFSC1324, 23NSFSC1736), Chengdu High-level Key Clinical Specialty Construction Project (ZX20201202020), Chengdu Science and Technology Bureau (2021-YF09-00102-SN and 2020-YF05-00003-SN), Sichuan Medical Association (Q21061), Sichuan Provincial Administration of Traditional Chinese Medicine (2020356), and the Health Commission of Chengdu (2022193 and 2022194)."