From Aleteia:
The city of Prague was protected from the plague on multiple occasions through devotion to the Child Jesus.
One of the most well-known devotions to the Child Jesus is represented by the miraculous statue of the Infant of Prague. It is a statue that has a fascinating history, and the devotion it inspired has been the source of countless miracles over the centuries. In particular, it is recorded that on multiple occasions devotion to the Infant Jesus protected the city of Prague from an epidemic.
From Father Peter Davies (The Miraculous Infant Jesus of Prague):
The pestilence called the “black plague” was raging through the [region of Prague]. Some of the community became ill, others had to be sent away … In all this trouble, the Prior himself was attacked by the plague, and was brought to death’s door. Father Cyril urged him to invoke the aid of the Divine Child. The Prior then and there promised that if he recovered, he would offer a novena of Masses before the statue of the Holy Infant. At once he felt relief, and in a few days was completely restored to health. He became a fervent promoter of devotion to the Divine Child, and assigned a special chapel for the veneration of the image of the little King.