During the 1925 serum run to Nome, also known as the "Great Race of Mercy," 20 musher

Mushing

Mushing is a general term for a sport or transport method powered by dogs, and includes carting, pulka, scootering, sled dog racing, skijoring, freighting, and weight pulling. More specifically, it implies the use of one or more dogs to pull a sled on snow or a rig on dry land...

s and about 150 sled dog

Sled dog

Sled dogs, known also as sleigh man dogs, sledge dogs, or sleddogs, are highly trained types of dogs that are used to pull a dog sled, a wheel-less vehicle on runners also called a sled or sleigh, over snow or ice, by means of harnesses and lines.Sled dogs have become a popular winter recreation...

s relayed diphtheria

Diphtheria

Diphtheria is an upper respiratory tract illness caused by Corynebacterium diphtheriae, a facultative anaerobic, Gram-positive bacterium. It is characterized by sore throat, low fever, and an adherent membrane on the tonsils, pharynx, and/or nasal cavity...

 antitoxin

Antitoxin

An antitoxin is an antibody with the ability to neutralize a specific toxin. Antitoxins are produced by certain animals, plants, and bacteria. Although they are most effective in neutralizing toxins, they can kill bacteria and other microorganisms. Antitoxins are made within organisms, but can be...

 674 miles (1,084.7 km) by dog sled

Dog sled

A dog sled is a sled pulled by one or more sled dogs used to travel over ice and through snow. Numerous types of sleds are used, depending on their function. They can be used for dog sled racing.-History:...

 across the U.S. territory of Alaska

Alaska Territory

The Territory of Alaska was an organized incorporated territory of the United States that existed from August 24, 1912, until January 3, 1959, when it was admitted to the Union as the State of Alaska...

 in a record-breaking five and a half days, saving the small city of Nome

Nome, Alaska

Nome is a city in the Nome Census Area in the Unorganized Borough of the U.S. state of Alaska, located on the southern Seward Peninsula coast on Norton Sound of the Bering Sea. According to the 2010 Census, the city population was 3,598. Nome was incorporated on April 9, 1901, and was once the...

 and the surrounding communities from an incipient epidemic

Epidemic

In epidemiology, an epidemic , occurs when new cases of a certain disease, in a given human population, and during a given period, substantially exceed what is expected based on recent experience...

. Both the mushers and their dogs were portrayed as heroes in the newly popular medium

Mass media

Mass media refers collectively to all media technologies which are intended to reach a large audience via mass communication. Broadcast media transmit their information electronically and comprise of television, film and radio, movies, CDs, DVDs and some other gadgets like cameras or video consoles...

 of radio, and received headline

Headline

The headline is the text at the top of a newspaper article, indicating the nature of the article below it.It is sometimes termed a news hed, a deliberate misspelling that dates from production flow during hot type days, to notify the composing room that a written note from an editor concerned a...

 coverage in newspapers across the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

.