A study shows that different fibril formations in the brains of deceased patients seem to correlate with various Alzheimer’s disease subtypes. 

Alzheimer’s disease–associated amyloid-β peptides trap microbes in the brains of mice and in the guts of nematodes, a study shows. 

Researchers earn applause after recalling two papers containing misinterpreted findings.

Researchers identify a protein in semen that enhances the transmission of HIV in culture, but whether it increases infectivity in humans is not yet known.