The graph shows the impact of vaccinations on the incidence of whooping cough, a childhood illness, between 1940 and 1990 in Britain.

The graph shows the impact of vaccinations on the incidence of whooping cough, a childhood illness, between 1940 and 1990 in Britain.
IELTS Writing Task Chart for The graph shows the impact of vaccinations on the incidence of whooping cough, a childhood illness, between 1940 and 1990 in Britain.
The line graph presents the total number of whooping
cough
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cases
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in Britain from 1940 to 1990, and the proportion of people vaccinated against the disease.
Overall
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, the trend in whooping
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cases
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cough cases
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was relatively downward, especially after the introduction of vaccination in 1955. Reported
cases
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of whooping
cough
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accounted for nearly 180,000 in 1940, making it the highest point recorded. The figure
then
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decreased substantially in the following five years, fluctuating between 60,000 and just under 100,000
cases
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. By 1950, the number of
cases
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rose again to around 160,000. After vaccination began, whooping
cough
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cases
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experienced a decline from approximately 80,000 in 1955 to less than 20,000 in 1975, when vaccine uptake reached around 81%.
However
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, as the share of people vaccinated declined to 30%, the incidence of
this
Linking Words
illness grew to 60,000 in 1980.
Subsequently
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, with vaccine uptake rising steadily to a final percentage of 94%, the number of whooping
cough
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cases
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fell gradually towards the end of the period.

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Sentences: Add more complex sentences.
Vocabulary: Replace the words cough, cases with synonyms.
Vocabulary: The word "number of" was used 3 times.
Vocabulary: The word "decline" was used 2 times.
Vocabulary: The word "around" was used 2 times.
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