Type 1 polio, the most dangerous strain, is beginning to loosen its grip on the world's most tenacious reservoir, in western regions of Uttar Pradesh.

印度北方邦的西部地区是全世界脊髓灰质炎最顽固的堡垒，在那里，最危险的1型脊髓灰质炎已开始得到控制。

youdao

The less dangerous P2 strain has been completely eradicated worldwide.

没有甲型那么危险的乙型小儿麻痹症已经在全球范围被消灭。

youdao

An outbreak of a dangerous strain of Escherichia coli bacteria in Germany has already killed 15 people and made 1, 000 more ill.

FORBES: Spain's Irresponsible Rage On E. Coli Outbreak

More than two weeks after a food poisoning epidemic broke out in northern Germany, at least 14 people have been reported dead and hundreds have fallen sick from an extremely dangerous strain of the E. coli bacteria found on imported cucumbers.

FORBES: Deadly Cucumbers Kill 14 in Germany, Death Toll Still Rising

We think we can actually model the mutations and limit it to the ones that are going to be biologically active or dangerous and then build vaccines ahead of time for the potentially dangerous strain of avian flu, if it comes along.

FORBES: Magazine Article