Why Epstein-Barr is the ‘everything virus’

Virtually all of us have been infected, but an unlucky few develop lifelong illness

A group of various people's silhouettes in a water-color style image.

Illustration by Marta Spendowska

When Rae Mainwaring was 13, she developed a peculiar illness. She recalls “just feeling awful” and experiencing a crushing fatigue. “I remember it being hard to put my finger on what it was,” she says. “It felt like a really horrible flu, but it just didn’t get better.” She missed six months of school in Birmingham, England, and attended part time for another six months.