<p>Is loneliness as bad for you as smoking 15 cigarettes per day? That’s the claim circulating on social media.</p><p>We trace this stat back to its source and speak the scientist behind the original research on which it is based, Professor Julianne Holt-Lunstad.</p><p>Presenter / series producer: Tom Colls
Reporter: Perisha Kudhail
Production co-ordinator: Brenda Brown
Sound Mix: Graham Puddifoot
Editor: Richard Vadon</p>