The retired N.F.L. quarterback Brett Favre told a congressional committee on Tuesday that he had been diagnosed with Parkinson’s disease, a progressive, incurable condition that causes tremors and stiffness,

Former NFL player Brett Favre announced this week that he's been recently diagnosed with the condition. Here's what you should know, according to experts.

Several prominent figures from all walks of life — including actors, singers and athletes — have been diagnosed with the disease over the years. Here are a few of those individuals and their stories.