Table 2:

Variables used in eqn set (2) along with one new parameter introduced in this model.

Symbol	Description	Value
$S$	Susceptible with no maternal antibodies
$S_M$	Susceptible with maternal antibodies
$I$	Infected from $\mathrm{S}$
$I_M$	Infected from $S_M$
$R$	Recovered and immune
$N$	Total population
$\gamma$	maternal antibody decay rate	4 per year

Other parameters are given in Table 1.