A Triumph Yet to be Won: V-day in the Polio War

Unit 10 Text 38

Learn the following words before reading

• poliomyelitis = pollio• virology department• formaldehyde• titer = titre• epidemic• devise• immunity• tissue

LOGOLOGO

Glance over the text quickly once and see if you can answer the following questions:

•Who was Dr. Salk?•How did he find the way to kill the Polio virus?• How effective was the Salk vaccine?

Background information

• Poliomyelitis, often called polio or infantile paralysis, is an acute viral infectious disease spread from person to person, primarily via the fecal-oral route. The term derives from the Greek. Although around 90% of polio infections cause no symptoms at all, affected individuals can exhibit a range of symptoms if the virus enters the blood stream.[3] In about 1% of cases the virus enters the central nervous system, preferentially infecting and destroying motor neurons, leading to muscle weakness and acute flaccid paralysis. Different types of paralysis may occur, depending on the nerves involved. Spinal polio is the most common form, characterized by asymmetric paralysis that most often involves the legs. Bulbar polio leads to weakness of muscles innervated by cranial nerves. Bulb

spinal polio is a combination of bulbar and spinal paralysis

Answer these questions without looking back at the text.

In a vaccinated person, polio virus is destroyed bya. Antibodies produced by the personb. Dr. Salk’s vaccinec. Some factor not mentioned specificallyThe final push for mass testing of the vaccine

came froma. The national foundation for infantile paralysisb. The United States governmentc. Dr. Salk and his co-workers

Power Bar中国专业 PPT设计交流论坛

PB模板组：lxym148

本模板作品由PowerBar模板组成员创作，部分图片素材来源于互联网，如有侵犯您的权利请即通知，立刻处理您可以自由：复制、发行、展览、表演、放映、广播或通过信息网络传播本作品 ;创作演绎作品惟须遵守下列条件：您必须按照作者或者许可人指定的方式对作品进行署名;不得以盈利为目的对本模板进行出售、收费下载或者做非实质性改动之后进行类似的行为

本模板作品由PowerBar模板组成员创作，部分图片素材来源于互联网，如有侵犯您的权利请即通知，立刻处理您可以自由：复制、发行、展览、表演、放映、广播或通过信息网络传播本作品 ;创作演绎作品惟须遵守下列条件：您必须按照作者或者许可人指定的方式对作品进行署名;不得以盈利为目的对本模板进行出售、收费下载或者做非实质性改动之后进行类似的行为