I live in a location where the Aedes Aegypti mosquito is prevalent. In my area it is responsible for the spread of Dengue Fever mostly but also other nasties. It's also a very busy area for overseas tourists, mostly from parts of Asia, but from everywhere really.

In the past I have used a neem tree oil to repel them but now have changed to using a chemical based repellent which I really don't like doing, but it is absolutely necessary here. In any given day I'm in the proximity of dozens and more of newly arrived tourists at the same time that mosquitoes are buzzing around. That's mosly dawn and dusk and it's so hot here that's when people are outside a lot.

The advice from my country is for women who are actively seeking to become pregnant or are pregnant right now, to avoid going to the list of places where Zika has been found. The problem with that is that every day it seems another place is added to the list. Costa Rica is not on our govt. list today btw, although it could be by May.

Either way, it's imperative that everyone who lives in areas where there are mosquitoes, starts wearing a mosquito repellent. It's impossible wear clothing to cover the whole body in this heat. It's also imperative that tourists who are moving from country to country, via ship or air, alert authorities the moment they suspect they are ill from "something" and have a fever, rash, conjunctivitis, headaches, or aches and pains. That's the difficult thing, self-reporting, plus the symptoms are the same for Dengue and Chikungunya (also Ross River Fever here).

pinkynose, If they're not going until May, they have some time to see how it pans out there. If they're going for sure, then would need to postpone any pregnancy.