Researchers have discovered that the gut bacteria Klebsiella pneumoniae can migrate to the brain, leading to inflammation and cognitive decline that mimic Alzheimer’s symptoms. The study suggests that hospital-acquired infections combined with disrupted gut microbiomes may increase the risk of developing neurodegenerative diseases.

A large meta-analysis of over 600,000 people shows that experiencing loneliness significantly raises the risk of developing dementia by 31%. Researchers found that loneliness is a key factor in cognitive decline, contributing to conditions like Alzheimer's disease, regardless of age or sex.