Causes Of The Plague

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The plague was caused by a type of bacteria called Yersinia Pestis. The rats were the carriers of the disease; it originated from them. The fleas would then bite the rats and drink their blood. Then they would bite the humans and pass on the disease. People who are near animals that have this bacteria usually contract the disease it from rodents or flea bites. The only problem was that once it started people started blaming cats and killed them as they were animals of witches. Eventually, people began to notice that cat owners who had unlawfully kept their feline companions often seemed to avoid the plague. Once more observations and research discovered that it was the rats, and not the cats, that were guilty of spreading the deadly disease
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