The Black Death was an outbreak of Bubonic Plague in the Middle Ages in Europe; it is caused by infection with the bacteria Yersinia pestis, which is typically carried by rat fleas.
When people starting concentrating their populations in cities, it increased the number of people exposed at one time to the plague. Also, many individuals living in the cities were exposed to raw sewage, excessive air pollution and inadequate housing; they also suffered from a lack of adequate nutrition and little access to clean water. Because they were physiologically stressed with chronic afflictions, the plague killed many more people than may have died otherwise.
Finally, as people saw the start of the plague in the cities, they fled to the countryside to "get away from the foul miasmas". In doing so, they carried the rat fleas with their bacterial infections to the countryside and to other cities, spreading the plague across the continent.
Black Death moved from cities to cities. it spread in multiple directions at once so hard to tell.
The Black Death was spread by rats and the fleas they carried. The disease spread slowly across Asia as it moved through the rat population. Rats travelled on ships, which crossed the Mediterranean, and the rats got into various port cities, spreading the disease. The Black Death can be spread from person to person, but the spread is much slower and ends, in the absence of the rats and fleas.
The Black Death spread across Europe at 4km
People and rats lived in extremely close (and very filthy) conditions, making it easy for the plague to spread rapidly.
The cities were dirty which created a breeding ground for rats and rat fleas. Also, as the Black Death was highly contagious, people packed closely together had more opportunity to spread it.
black death spread in Europe. black death killed 75 to 200 million people.
yes, black death was spread in whole Europe. Russia also got black death.
black death was spread by Yersinia pestis bacterium. Rats and fleas help to spread it even more.
Black Death started in China. And it spread to Europe.
The Black Death was spread by fleas and rats. ik..gross
Black Death was started in Mongol army camps. It spread the whole world via Mongol army attacks.
To kill the remaining living viruses and bacteria.