These poor people

�

�

�

Let’s talk again

�

epidemic

�

�

�ratio�

�

Talk about the Black Death

�

�

�Actually it is�

�

epidemic

�

�

��

�

fourth century time

�

�The Black Death swept the world

�

�

��

�

Caused approximately 200 million deaths

�

�

�Twenty million people are�

�

What?

�

read

�

�

�It means the Europeans are dead�

�

Half

�

�

�

At that time

�

�Invincible in the world

�

�

�Not�

�

Mongolians

�

�

�Because the emergence of the Black Death directly made them�

�

�

Out of the main stage of history

�

�

�

Compare again

�

say

�

sixth century

�

�

�The Age of Discovery

�

�

�The Spanish came to America

�

�

�

What they brought

�

The fatal thing is not the ship

�

and

�

�rob

�

�

��

�

�is smallpox virus

�
To be continued...