Season 2014–2015
(n*=6514)
Incidence rate per 1000 person years (95% CI)Relative risk (95% CI)
Period at risk
(Days 0–42)
Control Period
(Days 43 to 84)
Any hospitalisation232
(199 to 269)
n†=178
236
(203 to 274)
n†=177
1.00
(0.79 to 1.26)
Hospitalisation for lower respiratory event99
(78 to 124)
n†=76
91
(70 to 115)
n†=68
1.12
(0.79 to 1.60)
  • *Number of LAIV recipients who completed follow-up for the two time periods, that is, until day 84.

  • †Number of incident cases.

  • LAIV, live attenuated influenza vaccine.