Hi Richard,
First, Zika is only a possible concern if you’re planning to travel to the warmer areas where the Aedes mosquitos live. This could include the coast and areas of the Amazon. So if your trip is limited to the highlands you should be fine. It is important to note that it can also be contacted through sexual contact with an infected person, so if your wife traveled to the coast and contracted it she could then infect you.
But the real issue is – is it dangerous? The general thought seems to be that it’s only a serious issue for women who are pregnant. In fact the majority of infected people don’t even have symptoms serious enough to warrant a doctor’s visit and some don’t realize they were even sick at all.
Personally, Zika won’t keep me from traveling to any of the areas where it has been reported, but it’s definitely a personal decision and should be based on your comfort level.