Who was infected by black plague?

The Black Plague, or Black Death, which swept through Europe in the 14th century, infected millions of people, with estimates suggesting that around 25 million died. The disease primarily affected urban populations, especially in crowded cities where sanitation was poor. It was caused by the bacterium Yersinia pestis, transmitted through fleas that lived on rats, as well as through human-to-human contact. Notable figures, including some noble families, were also affected, though specific historical records of individual infections are limited.