(To see the PPT.)

(1) We will try to know some basic information about epidemics in history.

Name of the epidemics Time Place Justininian's Plague (bubonic plague ) 500-550AD North Africa, the Middle East, Europe The Black Death 1330 Europe, Asia, Africa, the middle East The Great Flu Epidemic (The Spanish Flu) 1918 Similar as the Black Death SARS 2002/2003 China , Canada, Hong Kong,---

3. Read the text carefully and understand related science terms

In this text, a lot of medicine words are involved.

(1)To present question 3

What does the word "affect" mean in the 5th paragraph?

A 影响 B效果C感染D死亡

(2)Now read the text carefully and complete the sentences using medicine words in the text:

1. Bacteria and __________(病毒)have been around since the beginning of life on Earth.

2. It's important to look at the __________(传播)of diseases throughout history to discover the __________(原因)and __________(影响) of epidemics.

3. Another epidemic __________(开始) and __________(传播)in similar conditions was the Great Flu. It __________(侵袭)near the end of the first World War and __________(持续)after the war.

4. Doctors weren't sure how to __________(治疗)or __________(预防)it and since most people had no natural __________(防御)against the disease, it was harmful to doctors.

5. One half to one third of the population was __________(死于)to the Black Death. Less populated areas were less severely__________(感染).

6. SARS epidemic quickly __________(扩大)across the globe. Health experts worked together to __________(阻止)the virus in its __________(路径).

7. It __________(席卷)North Africa, the middle East and Europe.

(3)While doing these kind of exercise, explain some words such as "track".