Appendix 1.

Comparison of the age profile in novel swine influenza and our sample of seasonal influenza

Age categoryH1N1 novel swine flu* (n = 642) (%)Sample studied (n = 97/566) (%)
<24 months311
2–4 years510
5–9 years1214
10–18 years4012
19+ years4052
  • *Denominator not reported. From Andreasen et al.10

  • Age missing in two. Less than 100% because of rounding.