Type and abundance of mouth bacteria linked to lung cancer risk in non-smokers
The oral #microbiome may be linked to lung cancer risk in non-smokers.
Study found that more Bacteroidetes & Spirochaetes species was associated with lower risk while more Firmicutes species was associated with heightened risk.

https://medicalxpress.com/news/2020-12-abundance-mouth-bacteria-linked-lung.html