 This research has identified unique characteristics of extracellular vesicles, EVs, found in different body fluids. By using a combination of antibody-coated beads and tetraspain in specific antibodies, the research team was able to identify distinct EV profiles in each body fluid. This knowledge will help researchers better understand how EVs behave in various diseases and conditions. This article was authored by Elberta Giovanazzi, Matai J. C. Van Herwijnen, Marie Heiklin-Jan, and others.