TED Talks on Instagram: "Biomedical researcher Sonia Vallabh’s life was turned upside down when she learned she had the genetic mutation for a rare and fatal illness — prion disease — that could strike at any moment. In her moving TED Talk, she shares how this diagnosis led her and her husband to a new profession and about her mission to find a cure — before it’s too late. “Does everything happen for a reason?” she asks.“Probably not. And yet here we all are making our own grace out of the darnd