Two graphs are plotted below showing trends related to rubella in the state of Eldoria from 1980 to 2040:
Use the graphs to answer the following questions:
a.[1]
In what year was the rubella vaccine first introduced in Eldoria?
b.[3]
Describe the trend in the annual number of rubella cases from 1980 to 2010.
c.[1]
In 2012, a widely publicised online blog post raised safety concerns about the vaccine. What happened to the vaccine uptake (percentage of infants vaccinated) after 2012?