Table 1.

Description of the state variables and parameters of the Zika model (2.1).

Variable	Description
$S_B\left(t\right)$, $S_W\left(t\right)$	Susceptible newly born babies and adults
$E_B\left(t\right)$, $E_W\left(t\right)$	Exposed newly born babies and adults
$A_B\left(t\right)$, $A_W\left(t\right)$	Asymptomatic newly born babies and adults
$I_B\left(t\right)$, $I_W\left(t\right)$	Symptomatic newly born without microcephaly and adults
$I_{BM}\left(t\right)$, $I_{WM}\left(t\right)$	Microcephalic newly born babies and adults
$R_B\left(t\right)$, $R_W\left(t\right)$	Recovered newly born babies and adults
$S_V\left(t\right)$	Susceptible female mosquitoes
$E_V\left(t\right)$	Exposed female mosquitoes
$I_V\left(t\right)$	Infected female mosquitoes
Parameter	Description
${\pi }_B$	Birth rate newly born babies
p	Fraction of adults and newly born babies who are asymptomatic
$1-p$	Remaining fraction of adults and newly born babies who are infectious
α	Maturation rate
$r,q_A,q_I,q_R$	Fractions of newly born babies who are infected and have microcephaly
$1-r$	Remaining fraction of newly born babies who have microcephaly
η	Modification parameter
${\beta }_W,{\beta }_B$	Transmission probability per contact of adults and newly born babies
${\rho }_W$, ${\rho }_B$	Infectivity modification parameters in asymptomatic adults and newly born babies
${\sigma }_W,{\sigma }_B$	Progression rate of exposed adults and newly born babies
${\gamma }_W,{\gamma }_B$	Recovery rate of asymptomatic and symptomatic adults and newly born babies
${\mu }_W,{\mu }_B$	Natural death rate of adults and newly born babies
${\pi }_V$	Recruitment rate of mosquitoes
${\beta }_V$	Transmission probability per contact of susceptible mosquitoes
$b_V$	Mosquito biting rate
${\sigma }_V$	Progression rate of exposed mosquitoes
${\mu }_V$	Natural death rate of mosquitoes