the first in 1817 to '23, which was an Asian event.

第一次发生在1817到23年的亚洲
The second pandemic was in the 1830s and affected Asia,

第二场大爆发是十九世纪三十年代的亚洲
but also Europe for the first time, and North America.

同时欧洲和北美洲也第一次遭受了感染
The third pandemic of 1846 to '62,

第三次是1846年到1862年
afflicting Asia, Europe, again North America.

侵袭了亚洲欧洲和北美洲
The fourth pandemic, from '65 to '75, again it was global.

第四次是在65年到75年的全球大爆发
The fifth pandemic, from 1881 to '96, mainly a matter of Asia and Europe.

第五次是81到96年主要影响亚欧
The sixth pandemic of 1899 to '23,

第六次是1899年到1923年
again primarily an Asian and European event.

同样主要影响亚欧两大陆
And then the seventh pandemic, from 1960 onward,

第七次是从1960年以后
that went through Asia, South America and Africa.

侵扰了亚洲南美洲和非洲
The last pandemic, however, has been milder and less virulent,

这也是最后一次大流行然而更加温和