A computer illustration of Epstein-Barr virus (EBV) —Kateryna Kon/Science Photo Library—Getty ImagesCancer can seem random. It’s often the result of many factors, including genetic mutations that build up over a lifetime of exposure to sun, pollution, and other sources of DNA damage, combined with a person’s genetic predisposition. DNA damage accumulated over time can weaken the body’s ability to suppress out-of-control cell growth, which is how…