What do a 4-year-old from Brockton, Massachusetts and Marvel’s superhero Iron Man have in common? A lot more than you might think.

Iron Man faces a heart injury that nearly kills him, but creates a suit of armor that protects his heart and gives him superpowers. Zaire was born with scimitar syndrome, a rare condition in which the heart grows differently than normal. While he wears no armor, Zaire has developed his own superpowers — boundless energy and a super dynamic personality — after undergoing a new procedure to fix his heart at Boston Children’s Hospital. …