Preston and Travolta’s son died while staying at the family’s vacation in the Bahamas.
The causes of Kawasaki disease are unknown. Some scientists think it’s caused by an infectious agent, such as a virus. Some studies have noted a link between the disease and carpet cleaning chemicals.
They also have a daughter, Ella Blue, who was born in 2000.
“With my son … I was obsessive about cleaning — his space being clean, so we constantly had the carpets cleaned,” John Travolta told CNN’s Larry King in 2001. “And I think, between him, the fumes and walking around, maybe picking up pieces or something, he got what is rarely a thing to deal with, but it’s Kawasaki Syndrome.”