Harnessing the immune system to fight cancer

Immunotherapy uses the body's immune system to fight cancer. In blood cancer, a revolutionary t-cell therapy has cured patients and could show promise in solid tumours. In bladder cancer, the tuberculosis vaccine is infused to treat non-invasive cancer. However a shortage of BCG means researchers are having to test out other methods. Also, is Australia on the front foot when it comes to type 2 diabetes treatment? And what does copper in the brain have to do with Parkinson's disease?