What is Parkinson’s disease? Symptoms, causes and management

Bill Soong had started to shuffle. At the gym, the agile 71-year-old was holding on to the handlebars instead of running with ease. On a trip to New York, he couldn’t move his legs fast enough to board a train, leaving him stranded on the subway platform while his family waved to him from the carriage. His niece nicknamed him Uncle Slow Motion.

At first, Lesley Soong wasn’t fazed. Her husband was still a regular at the gym and working…