Relative Risk (RR) of Influenza-like Illness (ILI), Influenza, and Pneumonia by Vaccine Type and Formulation
| Outcomes . | Seasonal Only (n = 36655) . | pH1N1 Only (n = 47133) . | Seasonal (Any) + pH1N1 (n = 538035) . | TIV + pH1N1 (n = 196768) . | LAIV + pH1N1 (n = 341267) . | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n . | (%) . | n . | (%) . | RRa . | n . | (%) . | RRa . | n . | (%) . | RRa . | n . | (%) . | RRa . | |
| ILI | 4815 | (13.14) | 3043 | (6.46) | 0.49 | 35899 | (6.67) | 0.51 | 13388 | (6.80) | 0.52 | 22511 | (6.60) | 0.50 |
| Influenza | 290 | (0.79) | 42 | (0.09) | 0.11 | 521 | (0.10) | 0.12 | 197 | (0.10) | 0.13 | 324 | (0.09) | 0.12 |
| Pneumonia | 191 | (0.52) | 90 | (0.19) | 0.37 | 978 | (0.18) | 0.35 | 384 | (0.20) | 0.37 | 594 | (0.17) | 0.33 |
| Outcomes . | Seasonal Only (n = 36655) . | pH1N1 Only (n = 47133) . | Seasonal (Any) + pH1N1 (n = 538035) . | TIV + pH1N1 (n = 196768) . | LAIV + pH1N1 (n = 341267) . | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n . | (%) . | n . | (%) . | RRa . | n . | (%) . | RRa . | n . | (%) . | RRa . | n . | (%) . | RRa . | |
| ILI | 4815 | (13.14) | 3043 | (6.46) | 0.49 | 35899 | (6.67) | 0.51 | 13388 | (6.80) | 0.52 | 22511 | (6.60) | 0.50 |
| Influenza | 290 | (0.79) | 42 | (0.09) | 0.11 | 521 | (0.10) | 0.12 | 197 | (0.10) | 0.13 | 324 | (0.09) | 0.12 |
| Pneumonia | 191 | (0.52) | 90 | (0.19) | 0.37 | 978 | (0.18) | 0.35 | 384 | (0.20) | 0.37 | 594 | (0.17) | 0.33 |
Abbreviations: LAIV, live, attenuated influenza vaccine; TIV, trivalent inactivated influenza vaccine.
aCompared with those receiving seasonal influenza vaccine only.
Relative Risk (RR) of Influenza-like Illness (ILI), Influenza, and Pneumonia by Vaccine Type and Formulation
| Outcomes . | Seasonal Only (n = 36655) . | pH1N1 Only (n = 47133) . | Seasonal (Any) + pH1N1 (n = 538035) . | TIV + pH1N1 (n = 196768) . | LAIV + pH1N1 (n = 341267) . | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n . | (%) . | n . | (%) . | RRa . | n . | (%) . | RRa . | n . | (%) . | RRa . | n . | (%) . | RRa . | |
| ILI | 4815 | (13.14) | 3043 | (6.46) | 0.49 | 35899 | (6.67) | 0.51 | 13388 | (6.80) | 0.52 | 22511 | (6.60) | 0.50 |
| Influenza | 290 | (0.79) | 42 | (0.09) | 0.11 | 521 | (0.10) | 0.12 | 197 | (0.10) | 0.13 | 324 | (0.09) | 0.12 |
| Pneumonia | 191 | (0.52) | 90 | (0.19) | 0.37 | 978 | (0.18) | 0.35 | 384 | (0.20) | 0.37 | 594 | (0.17) | 0.33 |
| Outcomes . | Seasonal Only (n = 36655) . | pH1N1 Only (n = 47133) . | Seasonal (Any) + pH1N1 (n = 538035) . | TIV + pH1N1 (n = 196768) . | LAIV + pH1N1 (n = 341267) . | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n . | (%) . | n . | (%) . | RRa . | n . | (%) . | RRa . | n . | (%) . | RRa . | n . | (%) . | RRa . | |
| ILI | 4815 | (13.14) | 3043 | (6.46) | 0.49 | 35899 | (6.67) | 0.51 | 13388 | (6.80) | 0.52 | 22511 | (6.60) | 0.50 |
| Influenza | 290 | (0.79) | 42 | (0.09) | 0.11 | 521 | (0.10) | 0.12 | 197 | (0.10) | 0.13 | 324 | (0.09) | 0.12 |
| Pneumonia | 191 | (0.52) | 90 | (0.19) | 0.37 | 978 | (0.18) | 0.35 | 384 | (0.20) | 0.37 | 594 | (0.17) | 0.33 |
Abbreviations: LAIV, live, attenuated influenza vaccine; TIV, trivalent inactivated influenza vaccine.
aCompared with those receiving seasonal influenza vaccine only.
This PDF is available to Subscribers Only
View Article Abstract & Purchase OptionsFor full access to this pdf, sign in to an existing account, or purchase an annual subscription.
