Table 2.

Disease state variables and parameters (first group); opinion parameters (second group)

Symbol	Definition	Values
$S_i$	Susceptible subpopulation with attitude i
I	Infected and infectious population proportion
R	Recovered or removed population proportion
${\beta }_0$	Standard infection rate	0.4, 0.8
a	Multiplicative factor to reduce the rate of infection for susceptible populations with better prophylactic behaviour	2
$\gamma$	Rate of recovery from infection	0.1
${\omega }_i(I)$	Influence of susceptible with attitude i
${\omega }_0$	Influence when $I=0$	0.05, 0.1, 0.2
${\omega }_{max}$	Asymmetrical weighting for ${\omega }_{-1}$ and ${\omega }_{-2}$, which allows for prophylactic attitudes to have more influence when $I>0$	1, 3
k	Half-saturation constant involved in the saturating influence functions	0.1
$p_a$	Probability of amplification	0, 0.01, 0.05, 0.1

Boldface indicates default values