Britain’s first “bubble baby” has returned to Great Ormond Street Hospital to thank the doctors who saved his life 25 years ago. Born without a functioning immune system, he required specialist treatment to protect him from potentially life-threatening infections; his visit highlights the long-term impact of pioneering paediatric care.

The article centres on his recovery from a condition that left him unable to fight infection as a newborn. Now an adult, he revisited the London hospital and the medical team associated with his treatment, marking a milestone a quarter of a century after his life was saved.