Table 4

Risk of medically attended events: comparisons between LAIV recipients and matched unvaccinated children and IIV recipients

Season 2013–2014Period at riskIncidence rate per 1000 person-years
(95% CI)
Relative risk
(95% CI)
LAIV recipients
(n=4718)
Matched unvaccinated children
(n=14 085)
IIV recipients
(n=4716)
Versus unvaccinated childrenVersus
IIV recipients
Hypersensitivity3 days7
(0 to 37)
n*=1
19
(0 to 108)
n*=1
Seizures/convulsions42 days24
(13 to 40)
n*=13
21
(14 to 30)
n*=30
36
(22 to 56)
n*=20
1.11
(0.56 to 2.10)
0.65
(0.32 to 1.29)
Vasculitis