Aside from these high-risk groups, “it’s really hard to know who’s going to be affected by EBV and who isn’t,” says Shikha Jain, a hematologist and oncologist at Northwestern Medicine in Chicago. “Most people get infected with EBV as children, and once you have it, the virus persists for life but it can lie latent, without causing any symptoms.” Even when it’s in a state of suspended animation, however, there is always the possibility that it can become reactivated and cause problems in the future.

Source: Nearly All of Us Have a Virus that Causes Cancer – Tonic