Steve Filson, left, whose daughter Jessica died of fentanyl poisoning, and Amy Neville, right, whose son Alexander died, march outside the Snap headquarters in June 2021. Photograph: Patrick T Fallon/AFP/Getty Images Accidental deaths soar among young people amid a proliferation of fentanyl-filled pharmaceuticals Erin McCormick in San Francisco Fourteen-year-old Alondra Salinas had set outher new white...