Table 7.
Summary of VE parameters quantified from data retrieved from studies assessing vaccine efficacy to stop transmission (Rvac < 1) in vaccinated ducks
| Number of vaccinated groups | HI Hom. Median (IQR) (a) , (b) | HI Het. Median (IQR) | VEs Median (IQR) | VEsh Median (IQR) | Ves,sh Median (IQR) | Rvac |
|---|---|---|---|---|---|---|
| 7 | 8.1 (7.45–9.25) | 0.09 (0–0.92) | 0.6 (0.3–0.95) | 0.39 (0.27–0.53) | 0.69 (0.53–0.71) | R < 1 |
| 1 | – | 0.14 | 0 | 0.15 | 0.15 | R ≥ 1 |
(a)
Haemagglutinin inhibition (HI) titres (log2 transformed) measured using the vaccine virus strain as antigen [homologous (Hom)] or the challenges virus strain [heterologous (Het)].
(b)
IQR: interquartile range. The 25% and 75% quantiles are presented.