The invisible warning signs that predict your future health

It was a sunny day outside, with a hint of spring in the air. I followed Angela, whose name has been changed to protect her identity, down the corridor towards my consulting room in Melbourne. She'd been my patient for several years, but that morning I noticed her shuffling her feet a little as she walked. Her facial expression seemed a bit flat and I noticed she had a mild tremor. I referred her to a neurologist and within a week she was commenced on treatment for Parkinson's disease, but I kicked myself for not picking up on her symptoms sooner.