Table 3. Age stratified influenza vaccine effectiveness.

Crude age stratified IVE
Age groups	IVE	95% CI
0–17 years	44.7	(0–74.1)
18–64 years	46.1	(13.9–66.3)
≥65 years	NA	NA
Adjusted, age stratified IVE
Age group	IVE	95% CI
0–17 years	63.5	(0–88.7)
18–64 years	24.9	(0–87.2)
≥65 years	NA	NA