Table 13.

Priorities for age-based groups

priority	criteria for prioritization
	$\overline{\mathit{DR}}$	$\overline{\mathit{DC}}$	$\overline{\mathit{NRPD}}$	$\overline{\mathit{TNR}}$	$\overline{\mathit{AR}}$
1(top)	senior	adult	senior	adult	school
2	adult	senior	school	school	preschool
3	school	school	adult	senior	adult
4(bottom)	preschool	preschool	preschool	preschool	senior

$\overline{\mathit{DR}}$ - average death rate; $\overline{\mathit{DC}}$ - average death count; $\overline{\mathit{NRPD}}$ - average net return per dollar spent; $\overline{\mathit{TNR}}$ - average total net return; $\overline{\mathit{AR}}$ - average attack rate. $\overline{\mathit{DR}}$, $\overline{\mathit{NRPD}}$ and $\overline{\mathit{AR}}$ are normalized values that are comparable across subgroups.