The idea that silver can harm or kill werewolves is a fictional concept from folklore and fantasy, not a real-world phenomenon.
Here's why:
* Silver is an inert metal. It doesn't have any special properties that would harm animals.
* There is no scientific evidence to support the claim that silver can harm wolves or any other animal.
* The myth likely originated from the belief that silver could ward off evil spirits or demons.
Wolves, like any other animal, can get sick from various causes like infections, diseases, parasites, and injuries. However, these illnesses are not related to silver in any way.