By Joseph Gamp Scientists have moved one step closer in discovering an “elixir of life” – and it could work after just one treatment. Boffins have found a way to reprogramme a type of white blood cell, named a T-cell, which normally helps theimmune system fight off diseases. And as well as contributing to lower body weight and improved metabolism, these T-cells also attack ‘senescent cells’ – which are responsible for many of the diseases we grapple with later in life. As we age, senescent cells stop replicating and build up in our bodies – which can result in harmful inflammation. Now, a team…