Dr.Curtis has all his medical supplies for winter except an antitoxin for diphtheria. Diphtheria symptoms are difficult breathing,heart problems and even death.In Nome their has not been a case yet,but the disease is highly contagious and Nome will be in an outbreak.
A Single Push
A family with four kids arrived in town and the youngest was sick ,Dr.Welch thought it was a simple infection,the next day he died.Dr.Welch met a boy who had diphtheria.Dr.Welch needed a million bottles of the antitoxin.With no jets or anything like that so they used dogsleds.
The Final Musher
The town leaders hustled up their best dogsled drivers,it was a relay race against death,one driver will go get the antitoxin and go the the next village and pass it on to the other driver and so on a so forth. It was a dangerous trip with people getting frostbite and dogs getting fatigued.When the antitoxin got to the last driver it was a final push.