Immunology

Tackling a triathlon isn’t for the faint of heart. But Mark van Ooij, an Associate Scientific Director for Janssen Vaccines & Prevention B.V., is doing just that—and he’s taking what he’s learned from his disease to propel him forward.

An avid runner. A fireman. A college student. What they share in common may surprise you—and the battle to get their lives back after debilitating diagnoses will inspire you.