Why Did The Black Death Break Out When It Did?

 And Where Did It Spread?

 They fleas would come from rats that would make nests in the roofs and the corners of  the homes in the middle ages. it started out in the Gobi Desert of Mongolia, it spread to east china, after that to south India and west towards the middle east and medditerrainian, the plague started on oriental flea which bit into rats, traveled with trades on ships etc. etc. then the rats huddles into houses all around europe, the flee jumed off the rats and on to people, biting them in the spots i told you about before, then they would jump to others.  so the main reason the black death broke out when it did was because people didn't really have a concept of personal hygiene, weren't aware of the importance of it, or even could afford to apply it

~ http://en.wikipedia.org/wiki/Black_Death
~ medieval realms, deaths and diseases, by alex woolf

the black death's first break out was from 1346-1351 and took up to 200 million people! to the left is an image of the plague spreading over the four years over Europe. it shows the death in places over the place.

the black death was transmitted by flea bite  in areas such as the arm pits, groin, lymph glands and neck, they would enlarge and  swell. These bites were known as buboes, these buboes could grow as big as apples! they would bleed under the skin and red blotches appear, the blotches would turn black, and shortly after the victim would die.