The line chart below shows the effect of vaccination on the number of reported cases of whooping cough, a childhood disease, in Britain. The data was collected between the years 1940 and 1990.
In many nations, it is becoming mandatory to receive vaccinations in order to
prevent the spread of disease.
Do you think this is a positive or negative development?
The graph shows the impact of vaccinations on the incidence of whooping cough, a childhood illness, between 1940 and 1990 in Britain.
Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
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