[jcromartie]

It seems that microcephaly is associated with onset of Zika during the first trimester of pregnancy. Considering the mild nature of the illness, couldn't the virus be its own vaccine? Could a woman proactively contract the virus while postponing pregnancy, in order to thwart it?

[hemicyclium]

I expect the situation is similar to the flu: once you contract a strain, you develop immunity to that specific strain, but as soon as the disease, which is under highly selective pressure to mutate, mutates, you are once again susceptible to the new strain. It might work for a short while, but not a full pregnancy.