15th Century Rat Catching Bag

Background
In the 15th century, rat catchers were hired when the rat population was becoming a problem. This bag was imbued with the sorrow of Europe during the Black Death and gained the ability to eradicate epidemics, as well as cure any disease. Opening the bag will cause an apparition of a rat to appear from the mouth of an infected person and they will be cured of disease.

Today
Discovered at a hospital in Toronto when a nurse used it to cure all of its patients instantaneously. Kalvin Chan was sent to retrieve it. The only danger with this artifact is that using this artifact to cure the world of disease would make people immune to illness, and scientists would stop researching how to cure disease. If one day, the bag wasn't used to cure a disease, people would be highly susceptible to it.