Table 2. Crude and adjusted vaccine effectiveness against pandemic (H1N1) 2009 virus, Australia, 2010.
| Effectiveness | Influenza vaccine effectiveness, % (95% confidence interval) |
|||
|---|---|---|---|---|
| Seasonal | Monovalent | Both | Any | |
| Crude |
80 (39–93) |
42 (−62 to 79) |
84 (26 to 96) |
70 (42 to 84) |
| Adjusted* | ||||
| 0–19 y | Undefined† | 44 (−231 to 91) | Undefined‡ | −41 (−549 to 69) |
| 20–64 y | 89 (50 to 98) | 56 (−88 to 90) | 81 (7 to 96) | 81 (52 to 92) |
| All ages | 79 (33 to 93) | 47 (−62 to 82) | 81 (7 to 96) | 67 (33 to 84) |
*Adjusted for month of swab collection. †No controls vaccinated. ‡No controls or case-patients vaccinated.