Scientists believe they now understand why. In a paper published on Thursday in ‘The British Journal of Anaesthesia’, researchers attributed Cameron’s virtually painfree life to a mutation in a previously unidentified gene. The hope, they say, is that the finding could eventually contribute to the development of a novel pain treatment.

from Times of India https://timesofindia.indiatimes.com/home/science/why-this-71-year-old-has-never-felt-pain-in-life/articleshow/68640266.cms