I have a somewhat disturbing data point. I figured I'd look into this: I have access to a university library (Carleton University), and I'm sure it should have sources. My searches are turning up nothing. It looks like the entire field of research, all of it, on how Y. pestis interacts with the immune system, has been memory holed.

More generally, it looks like the entire field of research into how immune systems fail is being memory holed, because there are some pretty significant papers that I know for a fact the library ought to have, because I found and accessed them a few years ago, have been removed. Not just from the physical library, but erased from the search system as well.

The most likely explanation I see is that someone has realized this is a major problem and does not want anyone else to be able to piece it together. If so, we may in for a world class mess...