选修模块7 Unit 21 Human Biology Lesson 3 Epidemics Explained 课件（21张）

课件21张PPT。Objectives
At the end of the lesson, you are expected to be able to:
identify the structure of one type of discursive essays.
use the strategies of sequencing to put the text back together.
complete the sentences in Ex.4 in your own words.
voice your feelings about epidemics.arranging events in orderWhich of the following diseases is epidemic adj. ?

AIDS，cancer, flu, Bird Flu,
Hand-feet-Mouth Disease, heart disease
headache, backache, toothache, stomachache
TB = Tuberculosis 肺结核

(P. 38) 2 Work in pairs. Do you think these statements are true (T) or false (F)? Flu kills millions of people every year.
2) Most diseases are very new.
3) Epidemics have affected historical events.
4) It takes years for a disease to spread worldwide.
5) Epidemics can wipe out up to half of the population in urban areas.
6) More people died of a flu epidemic in 1918/1919 than died in World War I.
kill, destroyin a town or cityUnfortunately, they are all bloody truth.Death silently leapt from house to house,
Till he nearly lost his prey (被掠食者 ).
--Francis Macnamara British
People dropped dead like flies (苍蝇).
Grief-stricken mothers mourned their sons’ death,
Till their tears ran dry.Dr Garciano matter how good modern science is, a future epidemic is inevitable. Epidemics
throughout history What does the writer tell us in the background introduction?With recent press reports drawing parallels between Bird Flue and a killer epidemic in the past, Jim Smith looks through the history of epidemics for clues about what the future might hold.
draw parallels
A. to draw the sign “=”
B. to show two different things are similar
hold clues for Bird FluBBird Flu is similar to a killer epidemic
in history.
A scientist looks through the history of epidemics
to find clues for the Bird Flu.Read the first two paragraphs and find out why scientists look through the history of epidemics.
They want ________.
to find out how epidemics have happened
to predict and prevent epidemics in the future
to see how bacteria and viruses have been affected human life
to see what the future of the world will be like
Statement:
The Bird Flu is a modern adaptation
of the Spanish Flu.
Problem:
how to foresee and prevent it?Read the last paragraph and see if the essay writer presents a solution? If he does, what is it?
Yes, he does.
Countries will need to work together to find a cure for Bird Flu as soon as possible.
We have to have faith that there will be solutions in time to stop a bird Flu epidemic in its tracks.How does he support his solution?
By analysing the epidemics in history.
The structure of this discursive essay1. Statement: Bird Flu=Spanish Flu 2. Problem: How to foresee and prevent it3. An analysis of the problem4. Solution: joint effort & faithPlease put the text back together.
Tips:
Follow the timeline.
Read the sentences before and after the gaps.
Match the five paragraphsA
B
C
D
E
Paragraph 3
Paragraph 5
Paragraph 8
Paragraph 10
Paragraph 12
What are the historical epidemics studied?
Justinian Plague, the Black Death,
the Spanish Flu, the SARS
Read for the missing information and fill out the form. Put down the key words only.
take ﹥100 lives50%, Roman Empire war, crowded cities, lack, health routines 50% be lost to
empire , emperor, empresshabit1348-
135050 million, 18 months, the young and fit new, doctors, no prescription, 9 months, 774, 8,000tabletsThe Great Flu Epidemic
(The Spanish Flu)2002/2003
Complete these sentences about the text in your own words. (Pair work Ex.4)
1. We know that epidemics have been with us for thousands of years because ...Which is the reason? Why?Read aloud after the tapePossible version
… it was recorded that the earliest epidemics occurred about 500-550 AD so that we are sure that bacteria and viruses had existed on earth long before that. Based on this knowledge, we can speculate that epidemics have been with us for long. As a matter of fact, many of today’s diseases are as old as humans.
500—550AD Justinian Plague — up to 50% of the population were killed — the down fall of the Roman Empire
epidemic – consequences
Alarming facts500—550AD Justinian Plague —50% killed —the
Roman Empire, North Africa, the Middle East,
Europe 1930’s, the Black Death —50% lost to. Asia, Europe,
Africa, the Middle East 1918, Spanish Flu, 50 million killed
18 months, Asia, Europe, Africa, the Middle East 2002—SARS –9 months –8,000 –774 Asia,
Europe, Africa, the Middle East 1997—Bird Flu –more than 100 lives, Asia,
America– future ? Are they convincing enough to support the solution?Countries will need to work together to find
a cure for Bird Flu as soon as possible.
With the international effort being made,
we have to have faith that there will
be solutions in time to stop a Bird Flu
epidemic in its tracks.
Latest breakthrough！
Bird flu vaccine successful
Scientists at the University of Hong Kong (HKU) and the US have developed an experimental H5N1 Bird Flu vaccine for people. Initial tests on mice showed the vaccine to be highly effective and the speed of antibody response was high.Share your feelings with your partner1.How did you feel after reading the article?
(Can science solve all the problems?
How can you contribute to it?
or … )
Our oath
Stop epidemics in their tracks.The structure of this discursive essay1. Statement: Bird Flu=Spanish Flu 2. Problem: How to foresee and prevent it3. An analysis of the problem4. Solution: joint effort & faithJustinian Plague, Black Death, Spanish Flu, SARSHomework
Page 86 Focus on reading
Analyse the reading material
Statement?
Problem?
Analysis of the problem (mention the aspects only)
Solution