Nose-Picking May Have a Surprise Link With Alzheimer's, Study in Mice Suggests

A 2022 Griffith University study found Chlamydia pneumoniae can travel from the nose to the brain in mice.

Damage to the nasal epithelium made nerve infections worse and increased amyloid-beta deposition in mouse brains.

Researchers say the olfactory route is a plausible pathway for pathogens and call for human studies to confirm relevance.