Table 4 Parameters used to simulate vaccination under different efficacy scenarios

r_v

Relative infectiousness of vaccinated animals

1% (50% as sensitivity analysis assuming infectiousness is proportional to the logarithm of viral load).

^6,7

r_{inf_v}

Relative infectiousness of vaccinated previously infected animals

0.15% (33% as sensitivity analysis assuming infectiousness is proportional to the logarithm of viral load).

⁶

φ_v

Relative susceptibility of vaccinated animals

100% (or 75% in scenario 2)

NA. Larger reduction in susceptibility unlikely given all vaccinated previously seronegative animals were infected in refs. ^6,7.

φ_{inf_v}

Relative susceptibility of vaccinated previously infected animals

75% (or 75% in scenario 2)

NA. Indication of reduced susceptibility⁶ but unable to reliably quantify in small population

1/ρ

The rate of waning of vaccine-induced effects

1, 3 or 10 years⁻¹