Modern explanations of the bubonic plague?

Plague came to Europe in the 14th century and rapidly conquered the continent. The pandemic, one of the worst in human history, killed tens of millions. Up to 60 percent of the population succumbed to the bacteria called Yersinia pestis during outbreaks that recurred for 500 years. The most famous outbreak, the Black Death, earned its name from a symptom: lymph nodes that became blackened and swollen after bacteria entered through the skin.

Explanation:

The Bubonic Plague, or Black Death was a disease, spread by rats in Africa and Europe. Over a short period of time, it affected millions and killed even more. It was the beginning of the second plague pandemic too.

Explanation:

I learned about this last year, there was so much death and destruction, it must have been a horrible time to live in.

so the story tells of someone named kaushik choudhuri, but he does not narrate the story, a girl named hema does. hema tells the story in a second person point of view because you (the reader) are supposed to be the boy named kaushik.

here's an excerpt i found: "i was ushered into the fitting room, your mother watching approvingly as i took off my coat and sweater and tried on the bra."

source:

can someone just answer this