The pictures of those lymph nodes are shocking. In the Methods section, they state that
> LN tissues were obtained from [...] LiveOnNY, the local organ procurement organization for the New York metropolitan area.
which makes it sound like the samples came from residents of NYC. NYC air quality probably isn't great, but those lymph nodes looked so bad that I assumed they must have come from a hyperpolluted megacity like Beijing or New Delhi!
Cars truly are the worst addiction our society has stooped to.