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Particulate matter gets trapped in lymph nodes in the lungs, greatly increasing the severity of infections with age: https://www.nature.com/articles/s41591-022-02073-x (academic) https://www.cuimc.columbia.edu/news/decades-air-pollution-undermine-immune-system (popular)
#pollution #airpollution #particulatematter #particulates #pm #lungs #lunginfection #lymph #lymphnodes #respiratorysystem #respiratoryinfections #immunesystem #nature #columbia #doi10.1038/s41591-022-02073-x