What % of 34-year-old children in the village will get influenza? Suppose that 80% of 34-year-old children

Question:

What % of 3€“4-year-old children in the village will get influenza?

Suppose that 80% of 3€“4-year-old children and 70% of 5€“8-year-old children in a village are vaccinated with QIV vaccine. Also assume that children who are not vaccinated have twice the incidence of influenza as the control group in Table 3.7.

Table 3.7 Attack rate for influenza by age and treatment group

OIV group Control group age 3.78% 5.69% 5.15% 3-4 5-8 1.70%