By 1957, Jack was growing increasingly ill from a fever, in which it is complicated due to the Chimera's changing the Earth's climate. His condition is the reason his mother insists that Joseph goes to New York City with Fyodor Malikov to give their son a better life. He and his mother were evacuated from Haven before it was destroyed by the Chimera. During the evacuation, Jack dropped one of his mittens in which his father kept it throughout his journey, hoping he will sees his family again.
Jack's condition is later resolved when a doctor gives him some medicine. He and his mother were later reunited with Joseph.