S2E16 The Call Came From Inside: Epstein–Barr virus and the biology of persistence

There’s a virus you probably already have. Epstein–Barr virus infects nearly 95% of adults worldwide. For many, it shows up once—fatigue, a sore throat, maybe a diagnosis of mononucleosis—and then disappears. But EBV doesn’t disappear. It stays, establishing lifelong infection inside B cells—the very cells responsible for immune memory. Most of the time, the immune system keeps it under control. But EBV is not passive. It shifts between latency and reactivation, adapts to immune pressure, and in some cases contributes to cancer and chronic disease. In this episode, we explore: How EBV infects epithelial cells and B cells The molecular mechanisms that allow it to persist for life Latency, reactivation, and immune system control Why EBV is linked to cancers like Hodgkin lymphoma and nasopharyngeal carcinoma How host genetics and viral variation shape disease risk And what new research suggests about finally preventing infection This isn’t just a story about a virus. It’s a story about what happens when infection never truly ends. Want to go deeper? Field Notes is my free, weekly newsletter where I expand on one key idea from each episode. It’s not a summary—it’s a shift in perspective. Subscribe here. Annotated citations are in the companion blog post at infectiousdose.com