Table 4.
Parameter descriptions and values for Model 4
| Parameters | Description | Value |
|---|---|---|
| Nh | Population size (humans) | 200,000 |
| Nv | Population size (mosquitos) | 1,000,000 |
| a | Mosquito biting rate (number of bites per mosquito per day) | 0.5 |
| b | Probability of infection from an infectious mosquito to a susceptible human (per bite) | 0.4 |
| β | Transmission rate from symptomatically infected humans to susceptible humans (per day) | 0.05 |
| α | Relative human-to-human transmissibility of exposed humans to symptomatic humans | 0.6 |
| τ | Relative human-to-human transmissibility of convalescent to symptomatic humans | 0.3 |
| ϴ | Proportion of symptomatic infections | 0.18 |
| 1/κh | Intrinsic incubation period in humans (days) | 5 |
| 1/γh1 | Duration of acute phase (days) | 5 |
| 1/γh2 | Duration of convalescent phase (days) | 20 |
| 1/γh | Duration of asymptomatic infection (days) | |
| 1/μv | Mosquito lifespan (days) | 14 |
| c | Transmission probability from a symptomatically infected human to a susceptible mosquito per bite | 0.5 |
| ρ | Relative human-to-mosquito transmission probability of exposed humans to symptomatically infected humans | 0.1 |
| 1/κv | Extrinsic incubation period in mosquitos (days) | 10 |
| R0 | Basic reproductive number | 1.486 |
Parameter values are consistent with the 2016 Zika outbreak in Brazil, Colombia, and El Salvador [26]