I want to know the answer to the following question:
Why were sled-dogs used to deliver medicine to Nome in 1925?
All the background I'm provided with is that "The race commemorates the famous 1925 serum run to Nome in which mushers and dogs like Togo and Balto took much-needed medicine to the diphtheria-stricken community of Nome when all other means of transportation had failed.". Is that enough to answer the question?
Answer: yes