By Meg Tirrell, CNN Since Johnny Lubin got the exa-cel treatment in October 2021, “he’s been like a normal child,” his mother says. “It’s life-changing for us.”Courtesy JR Lubin and Fabienne DesirCNN — Before Johnny Lubin got a potentially life-changing experimental treatment at the age of 13, he recalls, he had one main concern. “I was...
