How the Internet Is Helping a Father Fight an Illness Unknown to Science

In 2012, Matt Might saw down to write a blog post. The 5,000-word essay titled "Hunting Down My Son's Killer," which was also republished on Gizmodo , documented his and his wife's harrowing attempt to make sense of their son's mysterious illness. The post went viral online--setting the family down a road that could change medical research. In the New Yorker, journalist Seth Mnookin tells the story of what's happened since.