Core Insights - The research conducted by a team from the University of Science and Technology of China and Zurich University reveals a critical link between common viral infections and the onset of multiple sclerosis (MS), providing a new perspective on the disease's pathogenesis [1][2] - Multiple sclerosis is characterized by chronic inflammatory demyelination in the central nervous system, influenced by genetic susceptibility and environmental factors, with Epstein-Barr virus (EBV) identified as a major trigger [1] Group 1 - The study highlights that over 90% of adults globally are infected with EBV, which has been shown to be present in nearly all MS patients, although the specific mechanisms triggering the disease remain unclear [1] - Previous findings from the research team indicated that EBV infection activates specific memory cells in MS patients, leading to an erroneous attack on the protective myelin sheath, contributing to disease flare-ups [1] Group 2 - The new research uncovers a mechanism where EBV infection and specific genotypes jointly drive the occurrence of multiple sclerosis, explaining how genetic and environmental factors collaborate to cause the disease at a molecular level [2] - This discovery lays an important scientific foundation for the future development of targeted prevention and treatment strategies for multiple sclerosis [2]