Silver bullet

In folklore, a silver bullet is often one of the few weapons that are effective against a werewolf, vampire, witch, or other supernatural beings. The term silver bullet is also a metaphor for a simple, seemingly magical, solution to a difficult problem: for example, penicillin circa 1930 was a "silver bullet" that allowed doctors to treat and successfully cure many bacterial infections.

For other uses, see Silver Bullet (disambiguation).
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