Band 7+: 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.

The line graph demonstrates how many people suffer from whooping cough and the proportion of people vaccinated from 1940 to 1990 in Britain.

In general, it is clear that the number of whooping cough’s case was inversely proportional to the ratio of vaccinations. Before vaccine introduction, there were a large number of people causing this disease. After vaccination began in 1955, its figure finally observed a downward trend.

In 1940, the burst of whooping cough took place substantially. Consequently, there were over 170,000 incidences of this illness after a few years. This is followed by a remarkable decrease to 90,000 cases before its figure recovered an upward trend. At that point, this infection had over 145,000 patients per year until 1955.

After 1955, thanks to implementing vaccination policies, the whooping cough saw a significant slump in the number of incidences. Over a 5-year period from 1965, the percentage of people vaccinated was around 80%; as a result, only less than 40,000 people caught this infection during that time. However, its figure fluctuated wildly, specifically at 30% in 1975 leading to the increase again in the number of cases. Afterwards, the ratio of vaccine uptake ended with moderate rise.