Every year in Alaska a 1,000-mile dogsled race, run for prize money and prestige, commemorates an original “race” run to save lives. In January of 1925, a six-year-old boy showed symptoms of diphtheria, signaling the possibility of an outbreak in the small town of Nome. When the boy passed away a day later, Dr. Curtis Welch began immunizing children and adults with an experimental but effective anti-diphtheria serum. It wasn’t long before Dr. Welch’s supply ran out, and the nearest serum was in Nenana, Alaska—674 miles of frozen wilderness away. A group of trappers and prospectors volunteered to cover the distance with their dog teams. Operating in relays from trading post to trapping station and beyond, one sled started out from Nome while another, carrying the serum, started from Nenana. Oblivious to frostbite, fatigue, and exhaustion, the teamsters mushed relentlessly until, after 127 hours in minus 50-degree winds, the serum was delivered to Nome. As a result, only one other life was lost to the potential epidemic. Their sacrifice had given an entire town the gift of life.