[问答题]
a. Describe the relationshg7j7j ux zxt2+d7p- eyitu(cm4 xzexys5; s87lp between the incidence of measles infections and the pe8t (xzls;47 e5ysx cmurcentage of the population immunised.
参考答案:
As the percentage of children vaccinated increases, the incidence of measles decreases.