  In Costa Rica, the first known cases of Zika were reported in 2016. We looked
at the 2016-2017 Zika outbreak and explored the transmission dynamics using
weekly reported data. A nonlinear differential equation single-outbreak model
with sexual transmission, as well as host availability for vector-feeding was
used to estimate key parameters, fit the data and compute the {\it basic
reproductive number}, $\mathcal{R}_0$, distribution. Furthermore, a sensitivity
and elasticity analysis was computed based on the $\mathcal{R}_0$ parameters.
