It was a warm summer afternoon and Andrew Tucker was running on the track when his legs suddenly felt like they were about to buckle under him.
A few days later, he couldn't unscrew the cap of a toothpaste tube, spray a deodorant can, properly use a knife and fork, or even write.
These are just the mild symptoms of Guillain-Barré syndrome (GBS), which is a rare disorder that can be fatal. There is no known cure for the debilitating disease, nor does anyone know its actual cause.