The graph illustrates a 50-year period of whooping cough disease occurring among children in Britain before and after the inception of vaccination from 1940 to 1990.
From an overall perspective, the reported cases of this illness before the vaccine was put into use were significantly higher than after the vaccine implementation. The effect of vaccination was witnessed by a separate line implying that the more vaccines were consumed, the less whooping cough cases were numbered.
In 1940, the situation of this type of childhood disease began at a modest amount which was 50 thousand cases. However, there was a surge in the quantity of whooping cough patients, standing at around 170 thousand cases in the following year. Although the situation reported in the next years dropped considerably to 70 thousand cases, it rose back to the same level as it was in the beginning of the disease.
After the use of whooping cough vaccines, the illness was seen to start declining. It is evident that after 1960, although the situation still fluctuated, the cases were generally lower than they were before, reaching a low of nearly zero patients at that time and remaining under 50 thousand cases. In the early 1980, the vaccine consumption fell by approximately 50% resulting in the more severe the disease was. Nonetheless, the cases of whooping cough experienced a downward trend for the remaining period, even decreasing to zero, as the number of vaccines increased up to 94% in1990.