This is a Columbus Dispatch article, dated September 27, 1897, about an almost-epidemic of diphtheria. Though you can zoom in, the print is tiny, so I’m providing the text here:

“Dread Diphtheria Attacks Several Families in Clintonville.

“People in the Maple Grove and Clintonville school districts are very much alarmed over the appearance of dread diphtheria. The wells are all low and the country is as dry as a bone. The cold nights and hot days make a combination that is unhealthy to say the least; and added to this is the dust, minute seeds and other things blown by the wind and irritating to nose and throat. At present there are seven cases right on the pike between Clintonville and the Maple Grove switch.

“The school directors are thinking strongly of closing the schools before the disease becomes an epidemic.

“At Clintonville three little girls in the Snapp family have the dread throat trouble. At the switch, the Armstrong twins are ill and a child named Hardin is also down with the disease. There is another case over east and parents are becoming seriously alarmed. All the infected houses have been placarded.”

According to Wikipedia and the CDC, diphtheria is an infection caused by the bacterium Corynebacterium diphtheriae. Signs and symptoms vary from mild to severe. They usually start two to five days after exposure. Symptoms often come on fairly gradually, beginning with a sore throat and fever. In severe cases, a grey or white patch develops in the throat; this can block the airway and create a barking cough as in croup. The neck may swell in part due to enlarged lymph nodes. Complications may include myocarditis, inflammation of nerves, kidney problems, and bleeding problems due to low levels of platelets. Nowadays, children are vaccinated against diphtheria in combination with tetanus and pertussis.