Epstein-Barr: The virus nearly everyone carries and its possible role in MS

Medical Xpress

February 21, 2026

AI-Generated Deep Dive Summary

Epstein-Barr virus (EBV) is an incredibly common infection, with over 95% of adults worldwide carrying it. Often referred to as "the kissing disease," EBV typically causes mild or no symptoms and remains dormant in the body after initial infection. However, recent research has sparked interest in its potential connection to multiple sclerosis (MS), a serious autoimmune condition affecting the nervous system. While most people with EBV never develop MS, studies suggest that reactivation of the virus might play a role in triggering or influencing the disease's progression. EBV is part of the herpesvirus family and is one of the most prevalent human viruses globally. After initial infection during adolescence or young adulthood, it remains in the body for life, often without causing harm. However, scientists are now exploring whether EBV reactivation contributes to chronic health issues, including autoimmune diseases like MS. This research highlights the importance of understanding how latent viral infections might influence long-term health outcomes. The connection between EBV and MS is still being investigated, but it raises questions about why only a small percentage of individuals with EBV develop MS. Researchers are examining factors such as genetic predisposition, environmental triggers, and immune system responses that might interact with the virus to contribute to disease development. While more research is needed, these findings emphasize the potential for early detection methods or preventive strategies in managing MS. This emerging understanding of EBV's role in MS underscores the broader implications of viral infections on human health. For individuals interested in health and wellness, this information highlights the importance of monitoring long-term health after infection with seemingly benign viruses like EBV. It also opens doors for future research into how reactivated viral infections might be managed or prevented to reduce the risk of serious conditions like MS. Understanding the relationship between

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Originally published on Medical Xpress on 2/21/2026