概括大意和完成句子(阅读以下材料 回答第23——30题)Ebola Outbreak1. You

概括大意和完成句子(阅读以下材料，回答第23——30题)

Ebola Outbreak

1. You are likely aware that several countries in West Africa are battling an Ebola outbreak.Eb-ola is a

dangerous and often lethal viral infection.Scientists believe that humans contracted the vi-rus by eating the

meat of rare animals.It is now believed that bats are the primary carriers of the virus。

2. To date,there are only three major countries in West Africa experiencing a major outbreak:Si-erra

Leone,Liberia and Guinea. However,other countries such as Nigeria have reported confirmed cases of Ebola with

their border.

3.Unless you recently visited one of the three affected West countries,your risk of contracting the virus is

virtually zero.Unlike other recent airborne virus outbreaks like SARS,the Ebola virus can only be spread through

direct contact with an infected person.Specifically,Ebola is spread through contact with body fluids .Though the

virus is transmittable,only an infected person exhib-iting symptoms is communicable.

4. The signs and symptoms of Ebola are non-specific and patients typically exhibit them after a week of

contracting the virus.Symptoms may appear as early as two days or as late as three weeks after initial infection

.Symptoms include disgust,weakness and stomach pain.More uncommon symptoms include chest pain,bleeding and sore

throat.

5. Ebola is devastating because of its ability to attack and replicate in every organ of the body. This causes an

overstimulation of the body’s inflammatory response,causing the flu-like symptoms. The virus also causes bleeding

and impairs the body’s normal clotting mechanism（凝血机制）, making bleeding even more severe. Loss of blood

volume and decreased organ perfusion（器官灌注）ultimately lead to organ failure and death.

6 The current outbreak is the deadliest viral outbreak in over 35 years.While diseases such as the malaria（疟疾

）are far more communicable,Ebola is one of the world’s most fatal viral infec-tions.Ebola’s fatality rate

exceeds that of SARS.

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A. Am I at risk of contracting the virus?

B. Is the current outbreak the deadliest?

C. How do I know if I have contracted the virus?

D. What areas are currently affected?

E. What exactly does Ebola do to the body?

F. What caused the Ebola outbreak?