Page from the Harper's Weekly journal is entitled "How Antitoxines are Developed" and features content and photographic reproductions related to using antitoxins as a vaccine for the diphtheria virus. Top photograph is entitled "Inoculating a child with antitoxine" and depicts a child receiving a vaccine. Middle left photographs is entitled "Incubator containing 180 Erlenmeyer flasks" with a caption that describes how the flasks contain various stages of the diphtheria virus. Middle right photograph is of the Pasteur Institute, which is where the diphtheria antitoxin was made in New York. The bottom photograph depicts a laboratory where the diphtheria antitoxin is made.