[amit9gupta]

There has been some research on this, establishing the presence of microbiome in the brain:

https://www.biorxiv.org/content/10.1101/2023.02.06.527297v1

[mmmrtl]

Why hasn't it passed peer review yet? Maybe because they only used techniques prone to artefacts. IMO if a brain microbiome exists in healthy people it would have been seen already, with all the microscopy and sequencing done