New research has found ME/CFS is partly caused by genetics, related to the immune and nervous system.
The study, which is the world's largest - called DecodeME - identifies DNA differences which raise the risk of developing ME/CFS and tells us about possible biological causes of the illness.
It's being hailed as a milestone but it's not a definitive test - some of the eight differences are also often found in people without ME/CFS - so it can't yet be cleanly separated who's at risk and who isn't.
Professor Chris Ponting from the University of Edinburgh is an investigator on the DecodeME study. He joins Perlina to explain what still needs to be done.
Photo: PASIEKA
