On January 5, 2026, Jirdes Winther Baxter passed away at 101 years old — the last known survivor of the 1925 diphtheria epidemic in Nome, Alaska. A few years ago, we told the story of the Serum Run: the desperate relay of mushers and sled dogs who carried a life-saving antitoxin across Alaska, including to an 11-month-old Baxter. Today, that run lives on through the Iditarod Trail Sled Dog Race. Enjoy this classic HTW story, and stay tuned for new episodes soon! January 27, 1925. Musher “Wild Bill” Shannon and his team of sled dogs race off into the frigid Alaskan night. He’s carrying a package of life-saving serum, wrapped in fur to keep it from freezing. There’s no time to waste: nearly 700 miles away, in the snowed-in town of Nome, children are dying of diphtheria. Twenty mushers and hundreds of dogs are about to take part in an almost superhuman effort to ferry desperately needed medicine across the howling Alaskan wilderness. Who were they, and what did they endure to reach their goal? And as they pressed on, how did their efforts grip the nation? Special thanks to our guests, Pam Flowers, author of Togo and Leonhard, and Bob Thomas, author of Leonhard Seppala: The Siberian Dog and The Golden Age of Sleddog Racing 1908-1941. ** This episode originally aired Jan 23, 2023. -- Get in touch: historythisweek@history.com Follow on Instagram: @historythisweekpodcast Follow on Facebook: HISTORY This Week Podcast To stay updated: http://historythisweekpodcast.com To learn more about listener data and our privacy practices visit: https://www.audacyinc.com/privacy-policy Learn more about your ad choices. Visit https://podcastchoices.com/adchoices