what is a enzyme and how might they help cure the infection

Enzyme: a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.

In “Chapter 34: Tuesday, November 23,” Dr. Crumbly had euthanized dozens of animals, but he had also realized that turtles were immune to the rash because of an enzyme on their skin. He injected the enzyme into one of the rescue dogs (Ms. Maple) who had found the children in the woods.